To provide a method of removing surplus carbon dioxide from the atmosphere by using natural matter without using energy as much as possible generating carbon dioxide as a temporary countermeasure, since carbon dioxide is a main cause of global warming, as the data by specialists show, the warming is surely proceeding, prevention of the global warming is an essential problem of the humankind, while some ideas of enclosing carbon dioxide under the ground being proposed, which is an excellent idea if realized, still requiring 5-10 years to be prevailing to all over the world.

In the method for extracting and fixing carbon dioxide by hot spring water, hot spring water is taken into a water storage tank, compressed air is sent thereinto and mixed with the hot spring water by agitation, the hot spring water dissolved with carbon dioxide is led to a settling tank to extract and fix carbon dioxide.