A 3D printing method and apparatus using the same are provided. The printing method includes: generating a two-dimensional layer information related with multiple layer objects of a three-dimensional object according to a three-dimensional model information, whereas the three-dimensional object has a forming part and an object embedded part; analyzing the two-dimensional layer information to identify a forming region and an object embedded region within each of the layer objects, whereas the forming regions constitute the forming part and the object embedded regions constitute the object embedded part; selecting at least one section of the three-dimensional object as a separation plane; printing the layer objects, layer by layer, with a forming material and a supporting material, to coat the forming material onto the forming region without overlapping with the separation plane, and coat the supporting material onto the forming region overlapping with the separation plane and the object embedded region.