diff --git a/app/src/main/java/io/legado/app/model/webbook/Debug.kt b/app/src/main/java/io/legado/app/model/webbook/Debug.kt
new file mode 100644
index 000000000..82047ddd0
--- /dev/null
+++ b/app/src/main/java/io/legado/app/model/webbook/Debug.kt
@@ -0,0 +1,32 @@
+package io.legado.app.model.webbook
+
+import android.annotation.SuppressLint
+import io.legado.app.utils.htmlFormat
+import java.text.SimpleDateFormat
+import java.util.*
+
+object Debug {
+
+    var debugSource: String? = null
+    var callback: Callback? = null
+    @SuppressLint("ConstantLocale")
+    private val DEBUG_TIME_FORMAT = SimpleDateFormat("[mm:ss.SSS]", Locale.getDefault())
+    private val startTime: Long = System.currentTimeMillis()
+
+    interface Callback {
+        fun printLog(state: Int, msg: String)
+    }
+
+    fun printLog(source: String, state: Int, msg: String, print: Boolean = true, isHtml: Boolean = false) {
+        if (debugSource != source) return
+        if (!print) return
+        var printMsg = msg
+        if (isHtml) {
+            printMsg = printMsg.htmlFormat()
+        }
+        printMsg =
+            String.format("%s %s", DEBUG_TIME_FORMAT.format(Date(System.currentTimeMillis() - startTime)), printMsg)
+        callback?.printLog(state, printMsg)
+    }
+
+}
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