Networked remote control of workshop information brings user convenience while accompanied by security risks, in order to eliminate the potential threat of mobile terminal access workshop information system communication process, in view of the possible security problems in mobile terminal access workshop information system, the security mechanism of identity authentication, access control, abnormal behavior detection, black and white list filtering and access to the audit was designed, and a three layer to protect the security of information system was established. The test results show that the designed security mechanism can effectively improve the security of the mobile terminal access workshop information system, and can prevent the possible malicious attacks on the mobile terminal access workshop information system.