In view of the demand for security and protection of the electric power remote dialing system， an in-depth analysis is made of the possible hidden dangers to the system. An electric power safe dialing authentication system based on digital certificate authentication is designed and implemented. The technical characteristics of the system are dealt with such as its capability of certificate verification of both the dialing client end and the dialing grid and client end creditable access， data encryption and signature to avoid sensitive information leakage and distortion， while performing fine grained access control and user behavior auditing， effectively solving possible security problems with the electric power remote dialing system.