A heating and hot-water supply device applied to district and central heating, the device comprising: a heat source, a site requiring heating, an inlet tube (108 or 208) for said site requiring heating configured to supply heating water supplied from said heat source (120 or 220) to said site requiring heating (130 or 230) ; an outlet tube (109 or 209) for said site requiring heating configured to supply the heating water which undergoes heat exchange in the site requiring heating (130 or 230) to the heat source (120 or 220); a circulation connection tube (107 or 207) configured to be connected between the inlet tube (108 or 208) for said site requiring heating and the outlet tube (109 or 209) for said site requiring heating; a circulation pump (160 or 260) installed at a fluid circulation conduit and configured to connect the inlet tube (108 or 208) for said site requiring heating, the site requiring heating (130 or 230), the outlet tube (109 or 209) for said site requiring heating, and the circulation connection tube (107 or 207); and a controller configured to make the fluid circulation conduit a closed circuit during heating and operate the circulation pump (160 or 260); characterized in that a return water temperature measurement sensor (190 or 290) is provided to measure a temperature of heating return water flowing through the outlet tube (109 or 209) for said site requiring heating, and the controller operates the circulation pump (160 or 260) when the measured temperature of the heating return water measured by the return water temperature measurement sensor (190 or 290) rises to a temperature of the heating return water set by a user. a heat source, a site requiring heating, an inlet tube (108 or 208) for said site requiring heating configured to supply heating water supplied from said heat source (120 or 220) to said site requiring heating (130 or 230) ; an outlet tube (109 or 209) for said site requiring heating configured to supply the heating water which undergoes heat exchange in the site requiring heating (130 or 230) to the heat source (120 or 220); a circulation connection tube (107 or 207) configured to be connected between the inlet tube (108 or 208) for said site requiring heating and the outlet tube (109 or 209) for said site requiring heating; a circulation pump (160 or 260) installed at a fluid circulation conduit and configured to connect the inlet tube (108 or 208) for said site requiring heating, the site requiring heating (130 or 230), the outlet tube (109 or 209) for said site requiring heating, and the circulation connection tube (107 or 207); and a controller configured to make the fluid circulation conduit a closed circuit during heating and operate the circulation pump (160 or 260); characterized in that a return water temperature measurement sensor (190 or 290) is provided to measure a temperature of heating return water flowing through the outlet tube (109 or 209) for said site requiring heating, and the controller operates the circulation pump (160 or 260) when the measured temperature of the heating return water measured by the return water temperature measurement sensor (190 or 290) rises to a temperature of the heating return water set by a user. <EOS>