Temperate steppe net primary production (NPP) and its response to climate factors is one of the key issues in global change research.In this study,the temporal and spatial pattern of temperate steppe NPP were estimated by using a light use efficiency (LUE) model driven by MODIS atmosphere and land parameters in the Inner Mongolia Autonomous Region (IMAR) from 2001 to 2014.The results indicated that 1) spatial distribution of annual temperate steppe NPP showed a gradual decrease from the northeast to the southwest in IMAR.Mean annual NPP values for temperate steppe,meadow steppe,typical steppe and desert steppe biomes were 235.65,358.97,237.17 gC·m~(-2)·a~(-1) and 127.77 gC·m~(-2)·a~(-1),respectively.2) There was a rising trend in temperate steppe NPP during 2001 to 2014.Meadow steppe (in east Xilingol and Hulunbuir) and desert steppe (in west IMAR) exhibited obvious increasing trend,while typical steppe in Yin mountainous region and the center of Xilingol showed a decrease trend.3) Precipitation was the dominant driving force of temperate steppe NPP in IMAR.Meadow steppe NPP was correlated to both precipitation and temperature,but with more dependence on temperature,while precipitation influenced typical steppe and desert steppe NPP more seriously.