A method for obtaining a 3D image data of an object and a system using the same are disclosed. The method includes following steps: scanning an appearance of an object to obtain a first 3D image data placing the object on a formable base and obtaining an bottom surface model of the object by applying a forming device which allows the formable base to touch the object firmly scanning the bottom surface model to obtain a second3D image data and processing the first 3D image and the second 3D image to obtaining the 3D image data of the object.一種物件立體影像數據取得方法,取得物件之立體影像數據,其中物件包括外周面與底面。物件立體影像數據包括以下步驟:藉由掃描取像裝置掃描外周面,取得第一立體影像數據;將物件之底面置於可塑形基底上,並藉由定型裝置使底面與可塑形基底緊密貼合,以便於可塑形基底上留下底面之外觀模型;藉由掃描取像裝置掃描外觀模型,取得第二立體影像數據;以及,處理第一立體影像數據以及第二立體影像數據建立立體影像數據。S1~S4‧‧‧步驟
