Tube hydroforming process as an optimum process for manufacturing structural parts of automotive and TRIP steel as a material of best strength-ductility balance have drawn increasing attention in the automotive industry. Employment of the TRIP phenomenon to produce steels with higher strength without loss of formability has been the subject of many recent investigations. To evaluate the stability of retained austenite, average volume fraction and micro-texture evolution under the various deformation mode, in-situ and ex-situ uniaxial tensile test and hydroforming test were performed and analyzed by EBSD. Granular type austenite was more rapidly transformed to martensite than film type does. The austenite of bended(for tube making) or hydroformed sample is more unstable than that of uniaxial mode and thus more rapidly transformed to martensite. As deformation proceeds in uniaxial tension mode, the intensity of Goss and Brass component was gradually decreased.