diff --git a/tools/intellij-plugin/run/projects/test-project/src/main/java/test/TestJavaPlugin.java b/tools/intellij-plugin/run/projects/test-project/src/main/java/test/TestJavaPlugin.java
index 468afdad0..2af0e12f8 100644
--- a/tools/intellij-plugin/run/projects/test-project/src/main/java/test/TestJavaPlugin.java
+++ b/tools/intellij-plugin/run/projects/test-project/src/main/java/test/TestJavaPlugin.java
@@ -1,10 +1,30 @@
 package test;
 
+import net.mamoe.mirai.console.command.Command;
+import net.mamoe.mirai.console.command.CommandOwner;
+import net.mamoe.mirai.console.command.descriptor.CommandSignatureFromKFunction;
+import net.mamoe.mirai.console.command.java.JSimpleCommand;
+import net.mamoe.mirai.console.permission.Permission;
+import net.mamoe.mirai.console.plugin.jvm.JavaPlugin;
 import net.mamoe.mirai.console.plugin.jvm.JvmPluginDescription;
 import org.jetbrains.annotations.NotNull;
 
-public class TestJavaPlugin  extends net.mamoe.mirai.console.plugin.jvm.JavaPlugin {
+import java.util.List;
+
+public class TestJavaPlugin extends JavaPlugin {
     public TestJavaPlugin(@NotNull JvmPluginDescription description) {
         super(description);
     }
 }
+
+class TestCommand extends JSimpleCommand {
+
+    public TestCommand(@NotNull CommandOwner owner, @NotNull String primaryName, @NotNull String[] secondaryNames, @NotNull Permission basePermission) {
+        super(owner, primaryName, secondaryNames, basePermission);
+    }
+
+    @Handler
+    public void test(String s) {
+
+    }
+}
\ No newline at end of file
diff --git a/tools/intellij-plugin/src/line/marker/CommandDeclarationLineMarkerProvider.kt b/tools/intellij-plugin/src/line/marker/CommandDeclarationLineMarkerProvider.kt
index ee006718c..6d1d2d0e6 100644
--- a/tools/intellij-plugin/src/line/marker/CommandDeclarationLineMarkerProvider.kt
+++ b/tools/intellij-plugin/src/line/marker/CommandDeclarationLineMarkerProvider.kt
@@ -13,6 +13,7 @@ import com.intellij.codeInsight.daemon.LineMarkerInfo
 import com.intellij.codeInsight.daemon.LineMarkerProvider
 import com.intellij.openapi.editor.markup.GutterIconRenderer
 import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiMethod
 import net.mamoe.mirai.console.intellij.Icons
 import net.mamoe.mirai.console.intellij.resolve.getElementForLineMark
 import net.mamoe.mirai.console.intellij.resolve.isSimpleCommandHandlerOrCompositeCommandSubCommand
@@ -21,11 +22,24 @@ import org.jetbrains.kotlin.psi.KtNamedFunction
 
 class CommandDeclarationLineMarkerProvider : LineMarkerProvider {
     override fun getLineMarkerInfo(element: PsiElement): LineMarkerInfo<*>? {
-        if (element !is KtNamedFunction) return null
-        if (!element.isSimpleCommandHandlerOrCompositeCommandSubCommand()) return null
-        runIgnoringErrors { // not showing icons is better than throwing exception every time doing inspection
-            return Info(getElementForLineMark(element.funKeyword ?: element.identifyingElement ?: element))
+        when (element) {
+            is KtNamedFunction -> {
+                if (!element.isSimpleCommandHandlerOrCompositeCommandSubCommand()) return null
+
+                runIgnoringErrors { // not showing icons is better than throwing exception every time doing inspection
+                    return Info(getElementForLineMark(element.funKeyword ?: element.identifyingElement ?: element))
+                }
+            }
+            is PsiMethod -> {
+                if (!element.isSimpleCommandHandlerOrCompositeCommandSubCommand()) return null
+
+                runIgnoringErrors { // not showing icons is better than throwing exception every time doing inspection
+                    return Info(getElementForLineMark(element.identifyingElement ?: element))
+                }
+            }
+            else -> return null
         }
+
     }
 
     @Suppress("DEPRECATION")
diff --git a/tools/intellij-plugin/src/resolve/resolveIdea.kt b/tools/intellij-plugin/src/resolve/resolveIdea.kt
index b796980c2..eeb470978 100644
--- a/tools/intellij-plugin/src/resolve/resolveIdea.kt
+++ b/tools/intellij-plugin/src/resolve/resolveIdea.kt
@@ -12,6 +12,7 @@ package net.mamoe.mirai.console.intellij.resolve
 import com.intellij.psi.PsiClass
 import com.intellij.psi.PsiDeclarationStatement
 import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiModifierListOwner
 import com.intellij.psi.util.parentsWithSelf
 import net.mamoe.mirai.console.compiler.common.castOrNull
 import net.mamoe.mirai.console.compiler.common.resolve.*
@@ -43,15 +44,22 @@ import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstance
  * For CompositeCommand.SubCommand
  */
 fun KtNamedFunction.isCompositeCommandSubCommand(): Boolean = this.hasAnnotation(COMPOSITE_COMMAND_SUB_COMMAND_FQ_NAME)
+fun PsiModifierListOwner.isCompositeCommandSubCommand(): Boolean = this.hasAnnotation(COMPOSITE_COMMAND_SUB_COMMAND_FQ_NAME)
+
+internal fun PsiModifierListOwner.hasAnnotation(fqName: FqName): Boolean = this.hasAnnotation(fqName.asString())
 
 /**
  * SimpleCommand.Handler
  */
 fun KtNamedFunction.isSimpleCommandHandler(): Boolean = this.hasAnnotation(SIMPLE_COMMAND_HANDLER_COMMAND_FQ_NAME)
+fun PsiModifierListOwner.isSimpleCommandHandler(): Boolean = this.hasAnnotation(SIMPLE_COMMAND_HANDLER_COMMAND_FQ_NAME)
 
 fun KtNamedFunction.isSimpleCommandHandlerOrCompositeCommandSubCommand(): Boolean =
     this.isSimpleCommandHandler() || this.isCompositeCommandSubCommand()
 
+fun PsiModifierListOwner.isSimpleCommandHandlerOrCompositeCommandSubCommand(): Boolean =
+    this.isSimpleCommandHandler() || this.isCompositeCommandSubCommand()
+
 
 val KtPureClassOrObject.allSuperTypes: Sequence<KtSuperTypeListEntry>
     get() = sequence {