Haidian “City brain” is an important solution for the modernization，refinement，intellectualization and systematization of urban governance. The construction of “City brain” has a top-level design and a clear road-map. “City brain” master plan （outline） is the core content of top-level design. Led by Baidu，a joint working group composed of China city planning and Design Institute and other units has conducted dozens of investigations and discussions with various departments and communities. Through in-depth research，a set of brand-new and feasible planning guidelines has been formed，which embodies the core idea model of Haidian “City brain” And construction content. In 2020，Haidian “city brain” has played an irreplaceable role in the process of scientific and technological anti epidemic.