Each key operator is assigned a password and can manage one and more keys. By inputting the assigned password, verifying that the key door can be opened, the key is released when the password is entered again, the light is on, the operator takes the key and closes the door. This process computer records automatically (for example, an operator takes a key from a certain day, and so on). When the key is returned when the same password verification passed, the door can be opened, the current input password will be the key button corresponding to the light will be lit, the electronic control lock automatically rebound, but also into the appropriate key, close the door. Likewise this process is automatically recorded by a computer (e.g. an operator returns a key at a certain time, etc.).