diff --git a/app/src/main/java/io/legado/app/help/AppConfig.kt b/app/src/main/java/io/legado/app/help/AppConfig.kt
index b7229d709..ea4f9a846 100644
--- a/app/src/main/java/io/legado/app/help/AppConfig.kt
+++ b/app/src/main/java/io/legado/app/help/AppConfig.kt
@@ -244,6 +244,12 @@ object AppConfig : SharedPreferences.OnSharedPreferenceChangeListener {
             appCtx.putPrefString(PreferKey.ttsEngine, value)
         }
 
+    var webPort: Int
+        get() = appCtx.getPrefInt(PreferKey.webPort, 1122)
+        set(value) {
+            appCtx.putPrefInt(PreferKey.webPort, value)
+        }
+
     val autoChangeSource: Boolean
         get() = appCtx.getPrefBoolean(PreferKey.autoChangeSource, true)
 
diff --git a/app/src/main/java/io/legado/app/ui/association/FileAssociationActivity.kt b/app/src/main/java/io/legado/app/ui/association/FileAssociationActivity.kt
index 0cdb6ba84..bf28c0ea2 100644
--- a/app/src/main/java/io/legado/app/ui/association/FileAssociationActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/association/FileAssociationActivity.kt
@@ -48,6 +48,7 @@ class FileAssociationActivity :
                 if (treeUriStr.isNullOrEmpty()) {
                     localBookTreeSelect.launch {
                         title = "选择保存书籍的文件夹"
+                        mode = HandleFileContract.DIR_SYS
                     }
                 } else {
                     importBook(Uri.parse(treeUriStr), uri)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/BaseReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/BaseReadBookActivity.kt
index ec77fbbd7..27aa92a7c 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/BaseReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/BaseReadBookActivity.kt
@@ -61,7 +61,7 @@ abstract class BaseReadBookActivity :
         binding.navigationBar.setBackgroundColor(bottomBackground)
         viewModel.permissionDenialLiveData.observe(this) {
             selectBookFolderResult.launch {
-                mode = HandleFileContract.SYS_DIR
+                mode = HandleFileContract.DIR_SYS
                 title = "选择书籍所在文件夹"
             }
         }
diff --git a/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
index b4b4d4ceb..20089afd9 100644
--- a/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt
@@ -19,6 +19,7 @@ import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.primaryColor
 import io.legado.app.receiver.SharedReceiverActivity
 import io.legado.app.service.WebService
+import io.legado.app.ui.document.HandleFileContract
 import io.legado.app.ui.widget.number.NumberPickerDialog
 import io.legado.app.utils.*
 import splitties.init.appCtx
@@ -32,7 +33,11 @@ class OtherConfigFragment : BasePreferenceFragment(),
         appCtx,
         SharedReceiverActivity::class.java.name
     )
-    private val webPort get() = getPrefInt(PreferKey.webPort, 1122)
+    private val localBookTreeSelect = registerForActivityResult(HandleFileContract()) {
+        it.uri?.let { treeUri ->
+            AppConfig.defaultBookTreeUri = treeUri.toString()
+        }
+    }
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         putPrefBoolean(PreferKey.processText, isProcessTextEnabled())
@@ -43,7 +48,10 @@ class OtherConfigFragment : BasePreferenceFragment(),
         upPreferenceSummary(PreferKey.userAgent, AppConfig.userAgent)
         upPreferenceSummary(PreferKey.preDownloadNum, AppConfig.preDownloadNum.toString())
         upPreferenceSummary(PreferKey.threadCount, AppConfig.threadCount.toString())
-        upPreferenceSummary(PreferKey.webPort, webPort.toString())
+        upPreferenceSummary(PreferKey.webPort, AppConfig.webPort.toString())
+        AppConfig.defaultBookTreeUri?.let {
+            upPreferenceSummary(PreferKey.defaultBookTreeUri, it)
+        }
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -61,6 +69,10 @@ class OtherConfigFragment : BasePreferenceFragment(),
     override fun onPreferenceTreeClick(preference: Preference?): Boolean {
         when (preference?.key) {
             PreferKey.userAgent -> showUserAgentDialog()
+            PreferKey.defaultBookTreeUri -> localBookTreeSelect.launch {
+                title = "选择保存书籍的文件夹"
+                mode = HandleFileContract.DIR_SYS
+            }
             PreferKey.preDownloadNum -> NumberPickerDialog(requireContext())
                 .setTitle(getString(R.string.pre_download))
                 .setMaxValue(9999)
@@ -81,9 +93,9 @@ class OtherConfigFragment : BasePreferenceFragment(),
                 .setTitle(getString(R.string.web_port_title))
                 .setMaxValue(60000)
                 .setMinValue(1024)
-                .setValue(webPort)
+                .setValue(AppConfig.webPort)
                 .show {
-                    putPrefInt(PreferKey.webPort, it)
+                    AppConfig.webPort = it
                 }
             PreferKey.cleanCache -> clearCache()
             "uploadRule" -> DirectLinkUploadConfig().show(childFragmentManager, "uploadRuleConfig")
@@ -101,12 +113,15 @@ class OtherConfigFragment : BasePreferenceFragment(),
                 postEvent(PreferKey.threadCount, "")
             }
             PreferKey.webPort -> {
-                upPreferenceSummary(key, webPort.toString())
+                upPreferenceSummary(key, AppConfig.webPort.toString())
                 if (WebService.isRun) {
                     WebService.stop(requireContext())
                     WebService.start(requireContext())
                 }
             }
+            PreferKey.defaultBookTreeUri -> {
+                upPreferenceSummary(key, AppConfig.defaultBookTreeUri)
+            }
             PreferKey.recordLog -> LogUtils.upLevel()
             PreferKey.processText -> sharedPreferences?.let {
                 setProcessTextEnable(it.getBoolean(key, true))
diff --git a/app/src/main/java/io/legado/app/ui/document/HandleFileActivity.kt b/app/src/main/java/io/legado/app/ui/document/HandleFileActivity.kt
index 2f4cebcb9..1d315c883 100644
--- a/app/src/main/java/io/legado/app/ui/document/HandleFileActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/document/HandleFileActivity.kt
@@ -58,7 +58,7 @@ class HandleFileActivity :
         }
         val allowExtensions = intent.getStringArrayExtra("allowExtensions")
         val selectList: ArrayList<SelectItem<Int>> = when (mode) {
-            HandleFileContract.SYS_DIR -> getDirActions(true)
+            HandleFileContract.DIR_SYS -> getDirActions(true)
             HandleFileContract.DIR -> getDirActions()
             HandleFileContract.FILE -> getFileActions()
             HandleFileContract.EXPORT -> arrayListOf(
diff --git a/app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt b/app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt
index 76d13d73d..919e56690 100644
--- a/app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt
+++ b/app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt
@@ -46,7 +46,7 @@ class HandleFileContract :
     companion object {
         const val DIR = 0
         const val FILE = 1
-        const val SYS_DIR = 2
+        const val DIR_SYS = 2
         const val EXPORT = 3
     }
 
diff --git a/app/src/main/res/values-es-rES/strings.xml b/app/src/main/res/values-es-rES/strings.xml
index 34c9d2811..40ab66282 100644
--- a/app/src/main/res/values-es-rES/strings.xml
+++ b/app/src/main/res/values-es-rES/strings.xml
@@ -909,5 +909,7 @@
     <string name="tts_speech_add">语速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values-ja-rJP/strings.xml b/app/src/main/res/values-ja-rJP/strings.xml
index 8bbace29d..941df5cd6 100644
--- a/app/src/main/res/values-ja-rJP/strings.xml
+++ b/app/src/main/res/values-ja-rJP/strings.xml
@@ -912,5 +912,7 @@
     <string name="tts_speech_add">语速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index a060275a7..60ec51145 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -912,5 +912,7 @@
     <string name="tts_speech_add">语速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 04aa47e15..43e13a2d5 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -909,5 +909,7 @@
     <string name="tts_speech_add">語速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 82e3646b4..dbbf3a53d 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -911,5 +911,7 @@
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
     <string name="search_content_size">搜索結果</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 7c5c12665..1b42bc052 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -911,5 +911,7 @@
     <string name="tts_speech_add">语速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 279aa914b..6f83accdb 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -912,5 +912,7 @@
     <string name="tts_speech_add">语速加</string>
     <string name="open_sys_dir_picker_error">打开系统文件夹选择器出错,自动打开应用文件夹选择器</string>
     <string name="expand_text_menu">展开文本选择菜单</string>
+    <string name="book_tree_uri_t">书籍保存位置</string>
+    <string name="book_tree_uri_s">从其它应用打开的书籍保存位置</string>
 
 </resources>
diff --git a/app/src/main/res/xml/pref_config_other.xml b/app/src/main/res/xml/pref_config_other.xml
index ab979fc40..27a3cb17e 100644
--- a/app/src/main/res/xml/pref_config_other.xml
+++ b/app/src/main/res/xml/pref_config_other.xml
@@ -56,6 +56,11 @@
             android:key="userAgent"
             android:title="UserAgent" />
 
+        <io.legado.app.ui.widget.prefs.Preference
+            android:key="defaultBookTreeUri"
+            android:title="@string/book_tree_uri_t"
+            android:summary="@string/book_tree_uri_s" />
+
         <io.legado.app.ui.widget.prefs.Preference
             android:key="uploadRule"
             android:title="@string/direct_link_upload_rule"