1 INTRODUCTION  
2 THE SAGE PHOTOMETRIC SKY SURVEY AND OBSERVATION  
2.1 The SAGE Photometric System  
2.2 The SAGE Photometric Sky Survey  
2.3 Telescopes and Instruments  
2.4 Observations and Progress  
3 THE DATA REDUCTION PIPELINE  
4 TESTING FIELD OF NGC 6791 AND ITS RESULT  
5 SUMMARY