Abstract: General system theory focuses on the relationship between the system and external environment, laying emphasis on the analysis of mechanism to reduce system environment complexity. The main acting subjects of N district medical system establish a common systematic goal in a heterogeneous environment through clearing the input & output channels, to construct a system of rules with communication and trust mechanism as the main body, so that each actor can play the greatest function. Medical social workers will uphold the idea of people in the environment, paying attention to relationship of “personal troubles” and “public distress”, unite social support system of both doctors and patients through social activities to gather all social resources available, and bridge the doctorpatient relationship, reduce the complexity of medical system, maintain the benign circulation of the whole medical system. The multicooperation linkage development model provides a way for the localization of Chinese medical social work.
Key words:  general system theory|complexity| Mmdical social work