In this project, we study the quantum and classical cooperative phenomena based on the statistic physics and many-body theory. The systems under consideration range from traditional many-particle system to the soft condensed matter, from disordered to ordered structures, from macroscopic to microscopic phenomena, and from classical to quantum behaviors. As the backbone of this innovating group, the young researchers in the Institute of Theoretical Physics have made significant achievements in the fields of the statistical physics, quantum physics, many-body theory, and their applications.Their scientific papers have been cited by others for over 5000 times. Through this project, group members will focus on the development and application of statistical physics method and the quantum many-body theory, exploring the basic laws of nature emergent at different levels of matters, and developing new theories and computational methods applicable to the complex quantum systems. These explorations should have significant impact on understanding the formation of ordered phases, the fundamental problems of quantum physics, the complex structures of the matter, the origin of life,and the physics of the information processing. Incorporating with the latest experimental results, we will also study quantum coherent effects and artificial photosynthesis.