Mind map as an efficient visualization tools, its use of online and offline teamwork is also more and more, but the use of online collaboration tools is not much.The paper describes an implementation of a teamwork tool adopting B/S structure, whose significant function moduleis Mind Map. In this paper, the main functions, system structure, key technology and the related engineering method in the development process would be stated. It also talks about how to use TDD-Test-Driven Development and the IOC Vessel to optimize the favorable code organization structure and the ability of extension, maintenance and secondary development would be provided. Contrasting with the linear task management in the traditional collaboration system, the mind map is the visual and nonlinear tool aiming to stimulate thinking as well as brain bloom and flow and would have better interaction and lower threshold if we use the mind map to reveal the mutual relation of the teamwork tasks, and manage the project in the form of graphical interaction.