The invention discloses a remote access reinforced and centralized monitoring system. The system comprises an operation and maintenance terminal, a bastion host, target equipment and auditor user terminal; the operation and maintenance terminal is connected with the target equipment through the bastion host, the bastion host is further connected with the auditor user terminal; the bastion host comprises an administrator interaction interface, a policy management module, a policy configuration base, a user interaction interface, a data processing module, an application proxy module, an auditorinteraction interface, an auditing module and an auditing log database. Relying on the conception of the bastion host, a unique entrance and a unified interaction interface are constructed between theoperation and maintenance terminal and the target equipment to record the instruction and operation process of the user operation in detail; the session is audited and monitored in a centralized way,the recording, forwarding, callback, monitoring and auditing of the session data are realized, and the behaviors of all maintainers are regulated and controlled.