Abstract: The idea of cellularized satellite building blocks is an important concept in the Phoenix project launched by the DARPA. In this paper, the concept and the development status of cellularized satellite building blocks are discussed, and the key technologies of the cellularized satellite building blocks system are summarized, such as the modeling techniques under the complex constraint conditions, the structural distributed collaborative control techniques, and the control of the dispersed cellularized satellite building blocks system. The paper may provide references for the development of cost-saving modularized spacecraft with intelligent capability in China.