A joint project “Three-Dimensional Spatial Modeling, Updating and Integration”, which is coordinated by Chinese professor CHEN Jun (National Geomatics Center of China) and Germany Professor Liqiu Meng (Technical University of Munich) , has been granted by both NSFC (National Natural Science Foundation of China) and DFG (Deutschen Forschungsgemeinschaft) successively. From 2007 to 2009, it is proposed to have one workshop every year alternating between China nd Germany, longer personal exchange, using common data sets, common publications, and so on.