A large-scale cultivation device for growing kelp on the land and a method thereof are provided. The device comprises a cultivation container, a seawater processing mechanism communicated with the cultivation container, a cooling mechanism disposed in the cultivation container, and a fixation mechanism disposed at the bottom of the cultivation container. The method comprises the steps of: providing a first step of configuring the kelp on the fixation mechanism disposed on the bottom of the cultivation container providing a second step of guiding the seawater into the cultivation container after the seawater is sterilized and filtered by the seawater processing mechanism providing a third step of guiding the sterilized and filtered water by the seawater processing mechanism into the cultivation container providing a fourth step of using the cooling mechanism to control the temperature of the seawater in the cultivation container and providing a fifth step of repeating the second and third steps after adequate days so as to change water in the cultivation container without cleaning the bottom of the tank of the cultivation container and thus to grow kelp seedlings inside the cultivation container. Accordingly, an efficacy of cultivating large-scale kelps on the land can be achieved without being affected by environments and seasons.一種海帶陸上養殖量產裝置及其方法,其包含有一養殖容器;一與養殖容器連通之海水處理機構;一設於養殖容器中之冷卻機構;以及一設於養殖容器底部之固著機構;如此,可將海帶設於固著機構上,並置於養殖容器底部,且將海水以海水處理機構進行殺菌及過濾後引入養殖容器中,再以冷卻機構對養殖容器中之海水進行溫度之控制,且於適當天數後重複步驟二及步驟三,對養殖容器以不清缸底之方式進行換水,進而於養殖容器中形成海帶小苗。藉此,可不受環境及季節之影響,而達到於陸上以量產方式養殖海帶之功效。1‧‧‧養殖容器11‧‧‧保溫缸12‧‧‧蓋體13‧‧‧遮避元件2‧‧‧海水處理機構21‧‧‧殺菌單元22‧‧‧過濾單元23‧‧‧氣體供應單元3‧‧‧冷卻機構31‧‧‧冷凝器32‧‧‧包覆體33‧‧‧抗凍劑4‧‧‧固著機構41‧‧‧配重物42‧‧‧固定器60‧‧‧海帶61‧‧‧海帶小苗
