The invention discloses a method for storing natural gas. The method is realized by a natural gas storage technique consisting of a liquid storage tank, a liquid circulating pump, an adsorption tank, a molecular sieve dehydrator, a gas-liquid separator for natural gas, a compressor and a reducing valve. The method comprises the following steps: natural gas from a gas well or an oil well is subjected to pressure treatment to have the pressure reduced to 3.5 to 5 MPa or increased by the compressor to 3.5 to 5 MPa, and enters the gas-liquid separator for natural gas to undergo gas-liquid separation and then the molecular sieve dehydrator for dehydration and finally the adsorption tank to be absorbed by a natural gas absorbent; meanwhile, the liquid circulating pump is opened to remove absorption heat in time, and a gas vent valve of the absorption tank is opened after absorption is stable to fill gas to a pressure vessel of a user through an gas outlet; the liquid circulating pump continue circulating to provide heat for the separation of natural gas.