1. Ensure the daily operation of the company's IT system, monitor the status of hardware facilities such as servers and network equipment;2. Diagnose, analyze and solve the faults in the IT system;3. Ensure the security of IT systems, monitor and update anti-virus software, firewall and other security tools;4. Regularly evaluate the performance of IT systems, propose and implement optimization measures;5. Record IT system configuration, fault repair process and other related information;