Abstract: A low temperature purification system includes a reactor; a lye tank to store oxygen-rich alkaline absorbent; an exhausted gas supplier to provide vehicle exhausted gas to the reactor; a gasification pump arranged between the reactor and the lye tank to spray the oxygen-rich alkaline absorbent to the reactor; wherein the oxygen-rich alkaline absorbent is reacted with vehicle exhausted gas to generate a series of reactions to purify the vehicle exhausted gas. A low temperature purification method includes the following steps: (1) providing vehicle exhausted gas into a reactor; (2) providing oxygen-rich alkaline absorbent into a reactor to form reaction gas; (3) compressing the reaction gas by a piston to generate a series of reactions to generate reacted products; (4) separating liquid-gas-solid in the reacted products to purify the vehicle exhausted gas.