diff --git a/testable-core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java b/testable-core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
index 34e324a..af36b23 100644
--- a/testable-core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
+++ b/testable-core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
@@ -1,6 +1,6 @@
 package com.alibaba.testable.core.accessor;
 
-import com.alibaba.testable.core.exception.MemberNotExistException;
+import com.alibaba.testable.core.exception.MemberAccessException;
 import com.alibaba.testable.core.util.TypeUtil;
 
 import java.lang.reflect.Field;
@@ -17,8 +17,8 @@ public class PrivateAccessor {
         public static <T> T get(Object ref, String field) {
             try {
                 return PrivateAccessor.get(ref, field);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
                 return null;
             }
         }
@@ -26,16 +26,16 @@ public class PrivateAccessor {
         public static <T> void set(Object ref, String field, T value) {
             try {
                 PrivateAccessor.set(ref, field, value);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
             }
         }
 
         public static <T> T invoke(Object ref, String method, Object... args) {
             try {
                 return PrivateAccessor.invoke(ref, method, args);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
                 return null;
             }
         }
@@ -43,8 +43,8 @@ public class PrivateAccessor {
         public static <T> T getStatic(Class<?> clazz, String field) {
             try {
                 return PrivateAccessor.getStatic(clazz, field);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
                 return null;
             }
         }
@@ -52,19 +52,24 @@ public class PrivateAccessor {
         public static <T> void setStatic(Class<?> clazz, String field, T value) {
             try {
                 PrivateAccessor.setStatic(clazz, field, value);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
             }
         }
 
         public static <T> T invokeStatic(Class<?> clazz, String method, Object... args) {
             try {
                 return PrivateAccessor.invokeStatic(clazz, method, args);
-            } catch (MemberNotExistException e) {
-                System.err.println(e.toString());
+            } catch (MemberAccessException e) {
+                printError(e);
                 return null;
             }
         }
+
+        private static void printError(MemberAccessException e) {
+            Throwable cause = e.getCause() == null ? e : e.getCause();
+            System.err.println(cause.toString());
+        }
     }
 
     public static <T> T get(Object ref, String field) {
@@ -73,7 +78,7 @@ public class PrivateAccessor {
             declaredField.setAccessible(true);
             return (T)declaredField.get(ref);
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to get private field \"" + field + "\"", e);
+            throw new MemberAccessException("Failed to get private field \"" + field + "\"", e);
         }
     }
 
@@ -83,7 +88,7 @@ public class PrivateAccessor {
             declaredField.setAccessible(true);
             declaredField.set(ref, value);
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to set private field \"" + field + "\"", e);
+            throw new MemberAccessException("Failed to set private field \"" + field + "\"", e);
         }
     }
 
@@ -97,9 +102,9 @@ public class PrivateAccessor {
                 return (T)declaredMethod.invoke(ref, args);
             }
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to invoke private method \"" + method + "\"", e);
+            throw new MemberAccessException("Failed to invoke private method \"" + method + "\"", e);
         }
-        throw new MemberNotExistException("Private method \"" + method + "\" not found");
+        throw new MemberAccessException("Private method \"" + method + "\" not found");
     }
 
     public static <T> T getStatic(Class<?> clazz, String field) {
@@ -108,7 +113,7 @@ public class PrivateAccessor {
             declaredField.setAccessible(true);
             return (T)declaredField.get(null);
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to get private static field \"" + field + "\"", e);
+            throw new MemberAccessException("Failed to get private static field \"" + field + "\"", e);
         }
     }
 
@@ -118,7 +123,7 @@ public class PrivateAccessor {
             declaredField.setAccessible(true);
             declaredField.set(null, value);
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to set private static field \"" + field + "\"", e);
+            throw new MemberAccessException("Failed to set private static field \"" + field + "\"", e);
         }
     }
 
@@ -140,8 +145,8 @@ public class PrivateAccessor {
                 return (T)declaredMethod.invoke(companionInstance, args);
             }
         } catch (Exception e) {
-            throw new MemberNotExistException("Failed to invoke private static method \"" + method + "\"", e);
+            throw new MemberAccessException("Failed to invoke private static method \"" + method + "\"", e);
         }
-        throw new MemberNotExistException("Private static method \"" + method + "\" not found");
+        throw new MemberAccessException("Private static method \"" + method + "\" not found");
     }
 }
diff --git a/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberAccessException.java b/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberAccessException.java
new file mode 100644
index 0000000..4ad56ce
--- /dev/null
+++ b/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberAccessException.java
@@ -0,0 +1,26 @@
+package com.alibaba.testable.core.exception;
+
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * @author flin
+ */
+public class MemberAccessException extends RuntimeException {
+
+    public MemberAccessException(String message) {
+        super(message);
+    }
+
+    public MemberAccessException(String message, Throwable cause) {
+        super(message, getRootCause(cause));
+    }
+
+    private static Throwable getRootCause(Throwable cause) {
+        if (cause instanceof InvocationTargetException) {
+            return ((InvocationTargetException)cause).getTargetException();
+        } else {
+            return cause;
+        }
+    }
+
+}
diff --git a/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberNotExistException.java b/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberNotExistException.java
deleted file mode 100644
index b13a5ad..0000000
--- a/testable-core/src/main/java/com/alibaba/testable/core/exception/MemberNotExistException.java
+++ /dev/null
@@ -1,16 +0,0 @@
-package com.alibaba.testable.core.exception;
-
-/**
- * @author flin
- */
-public class MemberNotExistException extends RuntimeException {
-
-    public MemberNotExistException(String message) {
-        super(message);
-    }
-
-    public MemberNotExistException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-}