Abstract: The paper put forward a design scheme of design system of mine power supply based on B/S mode network structure,Web server and Access database,introduced development environment and design of main function modules of the system in details,and validated feasibility of the system through an example.The design system realizes effective integration and wide sharing of calculation resources,data resources and services resources,provides a convenient calculating method and rich equipment data for engineering designers,and effectively improves calculating efficiency of engineering design.