| Along with the development and the unceasing maturation of digital Photogrammetry technology .it's importance in measure field is also continuously strengthen. Now, our country is puting a lot of capitals in the precision of the digital camera to raises precision. And now, nearly every big city is upraising the upsurge to establishes digitlization city. We can prophesy in tens of years it will still get larger development. And the Photogrammetry of close-range is a branch of Photogrammetry and the subject of remote sensing, its importance cannot be questioned either. Through the method of Photogrammetry, close-range Photogrammetry can research the object's form, size and the state of moving. Through the way of the close-range Photogrammetry, to get object true size and establish three-dimensional model, and offer the necessary data to database of digital city . at the same time, it has also offered necessity survey data for a lot of production and life field. In measure part This paper discussed the directly linear translation ( DLT ) theory in detail , and how to use this theory to calculate inner and outer element, and also tell how to establish a three-dimensional control site. And in software part, from the exchange of data form, step by step we explain how to handle digital image , how to use pattern recognition and how to get control point , and discuss some important MFC question. And then we introduce the system function and it's instrument. At last we use the directly linear translation as measure basis and VC6. 0 as software platform to establish a close-range photograph survey system.and also test it's precision. Certainly, this system still has some drawbacks, but in summary part we give out some improvements method.
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