Thanks for replying.
at first, about#2, I can do that and I send 3D model with color to my pc.
Blender recognized the texture with color.
but about #1, I can't solve the problem.
As you said, I colorized before saving and when I open it in Meshlab, color data(texture) is displayed on the model. But when I open it in Blender, it isn't. Blender doesn't recognize texture.
It is necessary to export texture png at MeshLab before open the model in Blender?
I don't know how to export texture png at MeshLab.