I parented the body with the rig with automatic weights. But when I do it with the clothes, it will deform it weird. How can the clothes stuck to the body ?
In 3D modelling, “deform” just means it changes shape. It’s not necessarily a bad thing. You want the clothes deforming. You just don’t want them deforming poorly.
If you have a body underneath, and you’re rendering in Blender, first try a surface deform from the body instead of an armature
Otherwise, try a data transfer modifier to copy weights from the body on nearest face interpolated. At least, for tight clothes like these. A lot of pitfalls for people that are new to Blender when using a data transfer modifier, so be sure to read up on it, test simple cases when you have problems-- it’s definitely a modifier that’s worth your time to learn.
In any case, deleting skin under the clothing or giving it a transparent material is a good idea.