In the present invention, when the temperature is set by the user, the hot water temperature is continuously checked to warm up according to the set value. When the temperature reaches the proper temperature, the user stops the heating and maintains the desired temperature until the bath is finished. The present invention relates to a hot water holding and heating system, and more particularly, to a hot water holding and heating system that includes a heating unit 100 for supplying power to a heater in response to a heating control signal, A circulation pump 200 for supplying hot water heated by the heating unit 100 in response to a drainage control signal inputted from the outside into the bathtub and supplying water in the bathtub to the heating unit 100 in response to an incoming control signal A temperature sensor 300 provided in the bathtub for measuring and outputting the temperature of water in the bathtub A temperature setting unit 400 for providing a temperature value of water in the bathtub according to a users operation And periodically checks whether the temperature value output from the temperature sensor 300 is lower than the set water temperature value and if the temperature value is lower than the predetermined water temperature value, And a controller 500 for outputting an inlet control signal to the heating unit 100 and outputting a heating control signal to the heating unit 100 and then outputting a drain control signal to the circulation pump 200. Accordingly, there is an effect that the user can maintain a pleasant mood until the bath is finished.본 발명은 사용자에 의해 탕온가 설정되면, 탕온 온도를 지속적으로 체크하여 설정값에 따라 데우기를 진행하고 적정 온도에 도달하면 가열을 멈추어 목욕을 마칠 때까지 사용자가 원하는 온도를 유지시킬 수 있도록 하는 욕조용 탕온 유지 가열시스템에 관한 것으로, 가열제어신호에 응하여 히터에 전원을 공급시켜 유입된 물을 데우는 가열부(100) 외부로부터 입력되는 배수제어신호에 응하여 가열부(100)에 의해 가열된 온수를 욕조 내로 공급되도록 하고, 입수제어신호에 응하여 욕조 내의 물을 가열부(100)로 공급되도록 하는 순환펌프(200) 욕조 내에 마련되며, 욕조 내 물의 온도를 측정하여 출력하는 온도센서(300) 사용자의 조작에 응하여 욕조 내 물의 온도값을 설정할 수 있도록 서비스하는 온도 설정부(400) 및 온도 설정부(4
