After summarizing the information of the analysis and survey of this project for the past two years, the threshold value of cancer due to ingestion and inhalation from the environment for the inhabitant who lives for 40 years is 6.2×10-7 that is based on the following assumptions or factors：(1)the inhabitant lives around the gasoline stations；(2)the inhabitant will have the MTBE exposure through the ingestion of groundwater from the inhabitant’s well or from the aquaculture；(3)the inhalation exposure of MTBE during the duration of adding fuel； It shows that under multiple paths of exposure, the threshold value of cancer is within the acceptable range (10-6). The inhabitant will have very low health hazard for the exposure of MTBE. After collecting and evaluating the data and information of the impacts from the aspects of environmental influence, exposure risk, economical factors and the impacts on the refiners, it is not necessary to ban the MTBE entirely in the country. The Energy Policy Act of the Federal Government of the United States plans to ban MTBE nationally in 2014. It is to be believed that once the United States passes the Energy Policy Act, other countries will also consider to ban MTBE synchronously or plan the schedules for banning MTBE. It suggests that our country should also prepare the necessary steps for banning MTBE. When the new energy policy of our country is discussed, no matter whether MTBE will be banned or not, it suggests that the topics of MTBE should be also included.

methyl tertiary-butyl ether(MTBE), gasoline station,