Abstract:Gannan pasturing area lying in the Qinghai-Tibetan Plateau is the typical ecological sensitive region, as the main economical activity body and the essential making a strategic decision unit, the herds′ perception of the environment can effect the environment security in the pasturing area. The paper is based on a survey of 97 herd households by means of participatory rural appraisal(PRA). According to the distribution region, all survey herds were divided into two groups, one is the herd household of the pure pasturing area, the other is the herd household of the semi-planting-pasturing area, and the author compares their similarities and differences of perception towards the herds′ environment sense, the perception of the environment change and the reasons of the environment change. Based on these analysis results, the author provides the correlative policies and advices in the study region. The results indicate that the importance of environmental conservation is concerned, the herds of semi-planting-pasturing area have more favorable attitude towards it than the herds of pasturing area, but nearly 60 per cent can consider the environmental impact when the herds arranged agricultural practices. The majority of interviewees (nearly 85 per cent) consider that the local eco-environment is worse than 20 years before, the perception of the herds of the pure pasturing is more profound than the herds of the semi-planting-pasturing area. Over 40 per cent of the respondents think that overgrazing is the main reason of the eco-environment deterioration, and destroying vegetation(22.68 per cent) and climate changing(18.56 per cent) is following. However, there are many differences in the perception of the reasons of the environment deterioration between the two groups, the herds of the pure pasturing area thought the main reasons were overgrazing and climate changing, and the herds of the semi-planting-pasturing area thought the main reasons were overgrazing and destroying vegetation and excessively reclaiming land.