This study investigated the effects of atomized water purifying vehicle exhaust. Respectively, using three kinds of liquid atomized water, gas cars and motorcycles exhaust through water mist to improve and analyze. The research process using Pro/Engineer to design the atomize equipment and combine with exhausting pipe, and use Nebulizer to atomize water, using atomize liquid to purify the vehicles exhausting gases, analyze and discuss the system effect affect. Experimental results show that using Atomized water can improve the quality and reduce the experimental vehicle exhaust emissions CO of 77%, HC of 56%, NOX of 56%,and low the cost of required for installation water mist, just thousands can have the effect of exhaust gas purification.