Personal comfort systems（PCS）are commonly used in residential buildings in hot summer and cold winter zone，such as infrared heaters，foot warmers，local air heaters and so on. In order to explore the characteris? tics of thermal comfort under the action of personal comfort system，Hangzhou City was selected as the object，and the questionnaire survey，field test and laboratory test. The results showed that the PCS was used more than 50% of the characteristics of thermal comfort of residents under the action of personal comfort system in winter were studied bytime from late December to early February，with peak use between 18：00 and 20：00 on a typical day. Local operating temperature around the human body can be increased by 2.7℃ on average by the PCS. Under the action of the PCS，neutral operating temperature is 15.8 ℃. From the perspective of comfort and energy saving，the operating tem? perature around the human body is suggested to controlled at 13.9 ~ 20 ℃. The body parts with significant sensation of heat feeling under the action of PCS are the head，hands and feet. The optimal skin temperature of each part was obtained as 33℃ for the head，37℃ for the front chest，35℃ for the upper arm，36℃ for the back，37℃ for the abdo? men，36℃ for the lower arm，31℃ for the hand，36℃ for the thigh，38℃ for the calf，and 35℃ for the foot. It pro? vided a basis for the quantitative demand study of the residents′ personal heating equipment to improve their thermal comfort in winter.