A static triaxial apparatus was designed and manufactured after consideration of shortages in traditional methods for force and deformation measurement. Compositions, structure and functions of this apparatus were introduced. Within this apparatus, an inner force transducer together with digital image processing technology was adopted in order to provide a more accurate measurement of test results. PC functions were modular designed, in order to make the complex processing of interactive features more clearly and easier operation. Finally, results of a typical CD test of saturated sand showed the good performances of this apparatus.