After the passage of the Organization Law of Drug-Abuser Treatment Center in 1996, positions of social workers were set for the drug-abuser treatment center in prison. The professional thinking and services of social work were initially brought into the correctional system when prison administration functioned the role of social workers. After several years, multi-fold interactions between correctional officers and social workers occur. Based on the method of literature review, this article focuses on the role and service model of social work in prison. Meanwhile, this article will provide some feasible suggestions for the future prison social work.