Method and device for determining stability of ecosystem of watershed

The invention relates to a method and device for determining stability of an ecosystem of a watershed, and the method comprises the steps: selecting a plurality of evaluation indexes to construct a quality evaluation system of the ecosystem of the watershed which comprises a target layer, a criterion layer and an index layer; based on a target layer of the quality evaluation system of the ecosystem of the watershed, dividing all evaluation indexes into two parts of the ecosystem and a human social system, namely n evaluation indexes and m evaluation indexes; respectively calculating positive entropy values A of n evaluation indexes corresponding to the ecosystem and negative entropy values B of m evaluation indexes corresponding to the human social system by using an entropy weight model; determining the stability conversion force of the ecosystem according to the ecological system positive entropy A, the human social system negative entropy B and a Brussell model; and determining the stability of the ecosyst