The invention discloses a new energy developable quantity evaluation and development area selection method based on economy, and relates to the technical field of power system analysis. The method specifically comprises the following steps: selecting an area S (which can be a province area, a city area or a part of area) needing to be evaluated; obtaining the distribution of the wind power density/the solar annual radiation quantity of the area; preliminary screening is carried out according to project basic resource selection standards; (for example, an area with the radiation quantity largerthan 1400 kilowatt-hour/m<2> is selected for photovoltaic power generation), the preliminarily screened region serving as an area capable of being developed according to the theory, and measuring andcalculating the theoretical developable quantity of the area needing to be evaluated according to the total wind energy resource reserves in the area and a photovoltaic theoretical development quantity estimation model. According to the new energy developable quantity evaluation and development area selection method based on the economy, the economy of new energy development of one country or area in the future level year is scientifically evaluated, and on the basis, the new energy theory, technology and economic developable quantity are measured and calculated.