The invention relates to a processing method and the system of anti-harassment of mobile phone calls and messages and private communication, which is as follow: when grouping the contacts in the mobile phone address list according to different classes, a private group of private communicating contacts is added, and different scene modes of the user are set; when receiving a mobile phone call or a message (text message, multimedia message), depending on the grouping sort of the contact of the incoming call or the message or the multimedia message, and the current scene of the user, together with the behavior characteristics of the harassing call and the spam message with the database information of the public harassing message issued by the authoritative institution or obtained from social statistics, the corresponding process to the call, the message and the multimedia message of the mobile phone is executed to reduce harassment; meanwhile the communication records of incoming, dialed calls and message, multimedia message with the contacts in the private grouping are encrypted and preserved to protect the personal privacy of the user. The invention has the advantages of adopting the operating steps of uniform process, and resolving synthetically the harassment of calls, messages and multimedia messages for the mobile phone and the private protection.