The invention provides a Web management system for a power LTE wireless terminal and a terminal authentication method thereof. The Web management system comprises a Web server. The Web server comprises a terminal identity authentication module and a CGI (Common Gateway Interface) program module. The Web server carries out terminal identity authentication on a CPE terminal through the terminal identity authentication module, so the CPE terminal can access a power LTE wireless private network. A private key and a certificate generated by an SSL (Secure Socket Layer) tool are stored in the Web server. A user accesses an HTML static webpage of the Web server in an HTTPS mode based on an SSL protocol through a client Web browser, and further the CGI program module is triggered to carry out a corresponding function unit program. According to the system and the method, the secure embedded Web server is established through utilization of the common gateway interface (CGI) and the secure socket layer (SSL); terminal information query and terminal parameter configuration functions are realized on a power LTE-1.8GHz wireless CPE terminal; and the system and the method adapt to a power service device well and have relatively good application prospect.