当前我国资源、生态、环境最为突出的四个大问题是：环境污染、土壤侵蚀、水旱灾害和生物多样性受损，为全面评估我国陆地生态环境安全的态势，本文以水安全、土地安全、大气安全、生物质资源安全，即按水、土、气、生四大要素，选择16个项目，构建中国陆地生态环境安全度评价体系。进而，依据生态环境系统组合的宏观地带性与大区域的相似性与差异性，将中国陆地划分为10个大区，并按大区下的区域间差异划分出54个区块，对各大区生态环境的问题进行评述，提出实现“人与自然”再平衡的建议和措施。

There are four major issues in current status of resources, ecology, environment in China, including the environmental pollution, soil erosion, floods and droughts disaster, and biodiversity loss. This paper comprehensively evaluates the ecological and environmental security in terrestrial ecosystems in China, based on 16 indicators including security of water, land, atmosphere, and biomass resources. According to similarities and differences of the ecological and environmental macro-zonal distribution, the terrestrial ecosystems in China is divided into 10 one-level regions and 54 two-level regions, major ecological and environmental problems are analyzed, and proposals for realizing re-balance strategy of human and nature are put forward.