The present invention relates to a mobile Internet security service system, comprising: a security operation management device, including a key management platform, a device management and control platform, and a Trojan killing platform; a security application service device, including a short message encryption server, a voice encryption server, and an email encryption server and mobile office servers, providing security services for encrypted text messages, encrypted voice, encrypted emails, and mobile office; virtual security communication devices, including security gateways and policy management servers, providing virtual security channels and security protection functions; secure electronic market servers, storage security A set of security application programs reviewed and released by the operation management device for user terminals to download application software. The present invention can provide functions of mobile device management, secure and confidential communication, and malicious code detection and killing, and provides users with anti-theft, anti-leakage and secure communication services, ensures safe and reliable communication, and improves mobile Internet monitoring and management capabilities.