Adopted with Weight Centre Model(WCM) and Land Use Degree Model(LUDM), Climate data of China in recent 20 years and a 2-period Land Use /Land Cover (LUCC) data covering China are used to analyze impacts and direction of changes caused by climatic changes and human activities to China vegetation covers and land use. In the last 20 years, the dual impacts by climatic changes and economic development have led to Land Use Degree Weight Centre shift to Northeast 54km. In East-West direction, Land Use Degree Excursion Intensity is caused 81% by climatic changes and 19% by anthropogenic impacts; while in South-North direction, is caused 85% by climatic changes and 15% by anthropogenic impacts
