To meet the requirement of full deformation and strain component measurement by using laser speckle interferometry, which is necessary for the experimental research of the unrepeatable deformation. An electronic speckle pattern interferometry(ESPI) system was introduced in this paper. In this ESPI system, tri-wavelength lasers lights were used to independently sense two in-plane and out-of-plane deformation components, respectively. The three dimensional (3D) deformation information encoded by color speckle patterns was recorded by a 3CCD color camera. The color speckle interferograms were split into their red, green and blue components, and the 3D deformation data were quantitively determined by utilizing phase-shifting method and were furtherly denoised by phase filtering. Full strains were calculated by applying numerical differential operation on the unwrapped phase images. Experimental performance on the test sample demonstrated the data process and verified the validation of the proposed method.