The Domestic Violence Prevention Law was enacted in Taiwan in 1998. However, it was found that the judges rarely ordered or transferred the abusers for pre-sentence assessment, and it caused that very few abusers had been sentenced to clinical treatment in protection order, which jeopardized the original purpose of this law to prevent relapse in the future. This experimental project adopted action research as the methodology and tried to ameliorate the whole procedure. It included the following elements: police officer assisting the victim to fill risk assessment scale while report the case, new telephone-contact brief assessment by clinician, clinicians writing the report and treatment suggestion for judge, the judge ordering the treatment by referring to the brief assessment report, supervising contacts of various density made by the police officers and social workers, supervisor training enough treatment practitioners for providing treatment, and holding network meeting every two months. The advantages of this project could be concluded as the following: better communication among related practitioners, more abusers sentenced to treatment by judges, more supervising contacts made by police officers and social workers, more abusers participating in treatment to learn relapse prevention and self control. The project also identified abnormal domestic abuse reporting cases, such as 8% of victims maliciously abusing this law and 1.1% of victims making faulty reporting because of suffering from serious mental illness.