The first Antarctic Survey Telescopes (AST3-1),equipped with a 10k x 10k CCD and SDSS-i filter,was deployed to Dome A,Antarctica in January 2012.From March to May,the pilot observations had repeatedly surveyed nearly ~ 2,000 deg^2 with more than 3,000 60-sec exposures,and monitored the center of Large Magellanic Cloud with > 4,700 frames and several other fields on the Galactic disk with ~ 7,000 frames.After careful corrections of cross talk,overscan,dark current and flat field,aperture photometry has been performed on these images.For a 60-sec exposure with good image quality,the 5-sigma detection limit is 19 mag,and the photometric precision for bright stars reaches 2 mmag.The absolute astrometric precision is about 0.1",while the internal precision for bright stars is 0.04".