NOVELTY - Water supply device comprises a solar energy module (150), a water tub (110), a hydrochloric acid gas removal pipe (120), a circulating air cap (130) and a UV sterilizer (140). The water tub, which stores water, has water inlet pipe (111) and water exhaust pipe (113) that are installed at both sides. The water pipe (115) is installed at side of the water tub and a loop (116) is installed on the top of the water tub. The hydrochloric acid gas removal pipe is installed inside the water tub. Water inlet pipe is provided for supplying water through sidewall and floor of water tub.    USE - Water supply device.    ADVANTAGE - The water supply device has encapsulated inner surface, which prevents corrosion of inner surface of tank and reduces generation of hydrochloric acid gas.    DETAILED DESCRIPTION - Water supply device comprises solar energy module, water tub, pipe for removal of hydrochloric acid gas generated, circulating air cap and UV sterilizer. The water tub, which stores water, has water inlet pipe and water exhaust pipe that are installed at both sides. The water pipe is installed at side of the water tub and a loop is installed on the top of the water tub. The hydrochloric acid gas removal pipe is installed inside the water tub. Water inlet pipe is provided for supplying water through sidewall and floor of water tub. A filtering net (131) is installed inside the water pipe to prevent pollution. The solar energy module produces power source using solar energy to operate UV sterilizer. The inner wall of water tub has coating layer formed for chlorine anti-corrosion. Sidewall of water tub is formed in transparent tubular (117a) for measuring the water level of water tub and is equipped with water level confirmation ball (117b). The floor of water tub has exhaust line for dregs discharge (112). Water supply valve (115a) and a filter (115b) are also installed in a water pipe (115). The solar energy module includes collimator (151) condensing sunlight, converter (153) converting light condensed into energy from collimator and controller (155) supplying energy transformed with converter to UV disinfector (140). An INDEPENDENT CLAIM is included for a method for supplying water using water supply device, which involves:    (A) supplying water, which contains chlorine drug through water inlet pipe of water tub;    (B) flowing water through water inlet pipe which is low guided to sidewall and floor of water tub, and the hydrochloric acid gas removal pipe is used for minimizing the amount of generated hydrochloric acid gas inside a tank; and    (C) using water supply device which involves storing water of power increment in water tub, generating energy by using solar energy module, using energy of solar energy module run and UV disinfector, and then sterilizing water supplied from water pipe of water tub by using UV disinfector.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of water supply device equipped with solar energy module.    Water tub (110)    Exhaust line for dregs discharge (112)    Water supply valve (115a)    Filter (115b)    Loop (116)    Transparent tubular (117a)    Water level confirmation ball (117b)    Hydrochloric acid gas removal pipe (120)    Circulating air cap (130)    UV disinfector (140)    UV sterilizer (140)    Solar energy module (150)    Collimator (151)    Converter (153)