From the perspective of measurable and comparative, "environmental priority" is generally vaguely defined as environmental interests prior to economic interests. Both environmental interests and economic interests should have a dual value attribute of personal and property, which include personal environmental interests and property environmental interests, personal economic interests and property economic interests. Personal environmental interests and personal economic interests are equally important, property environmental interests and property economic interests also does not matter who is prior or who is not prior. Therefore, from the perspective of benefit analysis, the "environmental priority" essentially refers to personal environmental interests prior to property economic interests.