The invention relates to a technical collaboration and dynamic intelligent management system for power planning. The system is composed of the following nine system modules: a data management module, a power grid current situation analysis module, a power market analysis module, a power market predication module, a project management module, a power grid planning supervision module, a power supply planning and management module, a power grid planning and management module and a system management module. According to the system of the invention, new demands of the planning work can be met, adaptability of economic and social development is facilitated, a complete predication solution scheme is provided, and the management level is enhanced.