Disclosed are an apparatus and a method for detecting whether a content executed in a mobile platform of mobile communication terminal perform a communication operation without a user's reservation or permission, thereby preventing an unexpected communication operation. In this invention, if a content performs the communication operation due to its malfunction by a computer virus or a program error, the communication operation, such as voice calling or message transmission to unspecified communication terminal or access to arbitrary wireless internet server, is detected and interrupted. With the interruption of the unexpected communication operation, the user's damage, such as the payment of charges for communication services, is previously prevented. In case of the interruption of the communication operation, the user is informed of the erroneous content and the performed communication operation so that the user selects the corresponding contents to be deleted or preserved.