Taiwan has been one of the Asian countries where the sex crime treatments are highlydeveloped. However, it has been pointed out that the treatments of some paraphilia sexcrimes, such as frotteurism and exhibitionism, have not been satisfactorily applied. Aparaphilia sufferer is apt to commit sex crimes and is of high recidivism rate. There hasbeen no consensus on the criminal disposal and treatment of paraphilia.This research focuses on the measurement of penalty and treatment of exhibitionism(public indecency). Adopting documentary analysis, this research aims to (1) analyze thecrime modes of public indecency in the last four yeas; (2) discuss the measurement ofpenalty of exhibitionism; (3) examine whether relevant mental illnesses are involved incases involving exhibitionism and whether they are considered for the measurement ofpenalty by the judges.