PURPOSE: A manufacturing method of salt is provided to equip a solar energy collector with a heavy metal and radioactive processing facility, thereby producing a functional bio-salt. CONSTITUTION: A manufacturing method of salt comprises the following steps. A filtering apparatus sea inlet(11) is installed on one side of the upper part of a filtering cover(17). A hole(16) is equipped inside the multiple partitions(15). A sand filter tub(120), an oyster shell filter tub(130), charcoal filter tub(140), illite filter tub(150), a first zeolite filter tub(160), a second zeolite filter tub(170), a barley stone filter tub(180), and other tank(190) are installed successively from the filtering apparatus sea inlet. A sea pipe(7) is installed in another side of the filtering cover, and moves the filtered seawater. A pump(6) is installed in the middle of the sea pipe. An evaporation processing cover is installed in the upper part of a filter(1), and the upper part is open and cuboidal. A charcoal storage is installed in the lowest part of the evaporation processing cover. Mud and red clay storage is installed in the upper part of the charcoal storage. A hot water circulating pipe(8) installed in the upper part of the mud and red clay storage is built in a hot water pipe space. An evaporation processing board(22) is installed in the upper part of the pipe space. An evaporation processing sea inlet(21) is installed on one side of the upper part of the front evaporation processing cover. A solar energy collector(35) is positioned inside the solar energy collector cover, whereby the solar collectors are made from a board. The hot water circulating pipe is installed in the lower part of the solar energy collector. A cold water inlet(37) is installed on the side inclusive of the solar energy collector cover. A hot water pipe vent is installed on one side of the evaporation processing cover.본 발명은 하부에 설치된 여과장치(1)와, 상기 여과장치(1)의 상부에 설치된 증발처리조(2)와, 상기 증발처리조(2)의 상부에 처리된 태양열집열장치(3)으로 구성되며,
