On the basis of introducing application situation of information management in Gongchangling Mining Corporation, the advantage and disadvantage of B/S mode and C/S mode were analyzed. Respective characteristic of major developing technologies, such as JSP, ASP and PHP, had been compared. The feasibility of building office automation system based on B/S mode was discussed. The solving scheme of office automation system based B/S mode in Gongchangling Mining Corporation is put forward while retaining the original C/S system.