A pipe member for use in a thermal storage body comprising: multiple-route U-type spiral piping: constituted by a U-type spiral piping structure having two or more than two routes; wherein the first fluid inlet and outlet terminal of the U-type spiral piping structure of each route is installed at the top of the spiral piping structure center, and is connected with the bottom of the U-type spiral piping structure of each route through the central piping segment of U-type spiral piping of each route, and the second inlet and outlet terminal of each route is installed at the top end of the U-type spiral piping structure spirally via the piping segment of the second fluid inlet and outlet terminal of the U-type spiral piping structure of each route; a thermal insulating device : the individual central piping segments of U-type spiral piping of the multiple routes are concentrated adjacent to the axial center and the periphery of the central piping segments of U-type spiral piping of the multiple routes are respectively installed with a thermal insulating device , by way of the mentioned thermal insulating device , the thermal energy loss caused by thermal conduction between the concentrated central piping segments of U-type spiral piping of the multiple routes, and the U-type spiral piping structure of each route, and the piping segment of the second fluid inlet and outlet terminal of the U-type spiral piping structure of each route is substantially reduced; and a columnar thermal conductive body which is composed of solid state or colloidal object; wherein the multiple-route U-type spiral piping is spirally and annularly installed near the peripheral edge of the columnar thermal conductive body , and wherein the multiple-route U-type spiral piping allows a thermal conductive fluid to pass through the columnar thermal conductive body . multiple-route U-type spiral piping: constituted by a U-type spiral piping structure having two or more than two routes; wherein the first fluid inlet and outlet terminal of the U-type spiral piping structure of each route is installed at the top of the spiral piping structure center, and is connected with the bottom of the U-type spiral piping structure of each route through the central piping segment of U-type spiral piping of each route, and the second inlet and outlet terminal of each route is installed at the top end of the U-type spiral piping structure spirally via the piping segment of the second fluid inlet and outlet terminal of the U-type spiral piping structure of each route; a thermal insulating device : the individual central piping segments of U-type spiral piping of the multiple routes are concentrated adjacent to the axial center and the periphery of the central piping segments of U-type spiral piping of the multiple routes are respectively installed with a thermal insulating device , by way of the mentioned thermal insulating device , the thermal energy loss caused by thermal conduction between the concentrated central piping segments of U-type spiral piping of the multiple routes, and the U-type spiral piping structure of each route, and the piping segment of the second fluid inlet and outlet terminal of the U-type spiral piping structure of each route is substantially reduced; and a columnar thermal conductive body which is composed of solid state or colloidal object; wherein the multiple-route U-type spiral piping is spirally and annularly installed near the peripheral edge of the columnar thermal conductive body , and wherein the multiple-route U-type spiral piping allows a thermal conductive fluid to pass through the columnar thermal conductive body . <EOS>