Abstract: To improve the standardization and safety of substation operations, an intelligent lock control and management system for screen cabinets has been designed and implemented. The system involves installing intelligent locks on the cabinets and integrates with the auxiliary control system across the bidirectional isolation device of security zone Utilizing technologies such as intelligent locks without power supply and dual-lock control devices, the system fully integrates with the State Grid’s auxiliary control system and operation task management system. It enables functions such as remote authorized unlocking, real-time monitoring of cabinet lock status, and unlocking record tracking, thereby forming a closed-loop management system for substation operation authorization.