(ITSM (ITServiceManagement, IT service management), it is a set of high-quality methods to help companies effectively manage the planning, development, implementation and operation of IT systems. It connects the three essential elements of high-quality service: process, personnel and technology - standard process is responsible for monitoring the operation status of IT service, personnel quality is related to the unevenness of service quality, and technology ensures the quality and efficiency of service. The combination of these three key elements makes ITSM a magic weapon and a powerful tool for the company's IT managers to manage the company's IT system. "IT Service Management" is a set of process-oriented, customer-based, standard management approaches that help companies improve their IT service provision and support capabilities by integrating IT services and services.)