The invention provides a terminal dependable computing and data static safety system. The system comprises a server, a client computer and an authenticated microsystem module. The server is connected with the client computer through the network, and a template file of a dependable root system and a data pointer file from the client computer are stored in the server; a dependable authenticated microsystem is stored in the authenticated microsystem module and used for comparing data information of the server with that of the client computer, and after the client computer passes the hardware dependable authentication, the data pointer file, stored in the server, of the client computer is mapped to the hardware of the client computer; the authenticated microsystem module compares the data of the dependable root system tagged by the data pointer file with the corresponding data of a dependable root system of a storage sector of a hard disk; if the data is inconsistent, it is determined that the client computer is not dependable. The invention further discloses a terminal dependable computing and data static safety method. Real-time dependable monitoring is achieved before a remote terminal enters a system layer, and data safety is protected.