The invention discloses a system of uniformity providing key management and key operation services for a customer. The system includes a service deployment layer, a service layer and an application layer. The service deployment layer is formed by service processing servers and cipher machines. The service layer is formed by a uniform cipher service cluster, databases and a Redis cluster. The application layer is formed by a user, a mobile terminal, application services, a CA authentication server, KMS management and an LAM server. The service deployment layer, the service layer and the application layer are connected through routers or switches. The system does not need to use an application to participate in key management work, a key management system provides an application web node interface to facilitate encryption and decryption work completion of a user interface, an RESTFUL service interface is provided at the same time to facilitate user invocation, and the advantage of enhancing usability is achieved; and for defense of common web attacks, external keys of the key management system are all protected by SPK keys, the keys protecting SPK are inside encryption machine hardware, and the advantage of enhancing security of the keys is achieved.