Based on network management information system of enterprise in combination with an analysis of research actuality in forecast system of mineral resource evaluation and problems encountered in geological exploration, this paper presents the network information system for mineral resource exploration. With the social and industrial development tendency in mind, the authors deal with factors of management and business demands as well as the necessity and urgency of the construction of the network information system. Considering the defects of the traditional MIS and the merits of the Intranet MIS, this paper has determined the basic framework and working method on the basis of Intranet MIS. In addition, the structure and function of the network system have been designed.