NOVELTY - The building (30) has a building element for absorbing and storing solar heat. A fluid channel is formed within the building element for fluid to transfer the solar heat. A controlling device controls flow direction of the fluid. A liquid/water reservoir (330) i.e. swimming pool, is opened to atmosphere and liquidly connected to the fluid channel within the building element. A solar heat radiator e.g. airtight container (361), includes a port connected to the fluid channel and a wall thermally connected to ground and to the liquid/water reservoir.    USE - Solar energy building e.g. single floor or multi-floor building such as commercial building, industrial building, agriculture building, residential building, education building and defense building (all claimed).    ADVANTAGE - The building element is mainly made of glass with high strength to manufacture the building with less energy consumption. The building element can collect solar heat for building heating and cooling, and glass and metal can be recycled easily and cost effectively after service of the building. The building allows an energy saving covering of windows and doors to enable users to use either side of the covering to sunshine at any time and to control open or close angle of the covering at any degree, so that received solar energy in a space can be controlled continuously. The building allows a transparent heat insulation unit to allow sunlight passing in the building and to reduce heat loss. The building allows a solar heat absorber made of insulating glass to make the building element to be stronger against damage and breaking of the building when the absorber is a plate sheeped tank.    DETAILED DESCRIPTION - The building element is selected from a group consisting of a wall, a roof, a pillar, a veranda, a window, a door, a deck, awning, fence, path, driveway, brick, tile, covering of windows, covering of doors, solar heat collector, solar heat storage device and a fully sealed solar heat absorber. The building element is made of material selected from a group consisting of brick, stone, sand, soil, cement, reinforced cement, metal, alloy, bitumen, wood and plastic. The building element comprises a feature selected from a group consisting of a dark color surface, a solar heat absorbing coating on a surface, a metal covering with a solar heat absorbing coating, a metal covering having solar absorbing coating covered building material and transparent cover covering the building element. The fluid channel is selected from a group consisting of a liquid channel, a gas channel and a heat tube. The heat radiator is a liquid tank i.e. water tank (330), or a fluid tube. INDEPENDENT CLAIMS are also included for the following:    (1) an energy saving covering for buildings and transportation tools    (2) a solar heating system    (3) a solar heating device    (4) a recyclable solar heat collector and energy saving building element combination.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a multi-floor building using solar energy for heating and cooling.    Solar energy building (30)    Rotating angle control cord (304)    Connecting tube (323)    Water tank (330)    Water reservoir (360)    Airtight container (361)    Solar heat collector (3031)