Patent ID: 7428783

Claim:
A testing system for testing flatness of a surface of a workpiece, comprising: a testing apparatus including a testing box and a measuring apparatus; the testing box including a plurality of holders, the holders defining a datum plane; the measuring apparatus comprising a plurality of movable testing poles extending out of the testing box and a plurality of gauges configured for measuring distance of the testing poles retracting into the testing box, ends of the testing poles away from the testing box being located at the datum plane and configured for supporting the surface of the workpiece thereon to allow the gauges measuring retracting distance of the testing poles under the pressure of the workpiece, the retracting distance of the testing poles being equal to distances between testing points on the surface of the workpieces and the datum plane; and a processor being connected to the testing apparatus for receiving and processing testing data which are converted from the retracting distance of the testing poles measured by the gauges.