I download FBX file from Internet. There are fbx file and 1 folder contain texture map. When I import to Blender 2.8 they are not import with texture map. There are only model. How can I load texture map?
Ok. So the answer is - included with your model are texture maps for 2 separate materials: one for the lid, and one for the back wall. I had to add a new material slot to one of them (maybe both, I can't remember) and hook up the texture maps through those, but the UV's are fine. There is both a reflection map and a glossy included as part of the texture pack, however, they are both the same image so I used one for a roughness map, and I'm not sure if the other one is supposed to be metallic, because I don't know what the final product is supposed to look like, so I omitted it.
Anyway, I connected the textures by the number in the name of their respected object (the only ones that apply to your materials end in 02 and 04), through the node setup in the image below. Note that the color space for the roughness and the normal maps is set to non-color - this is important. Have a look:
I have a copy of the .blend file with everything connected. Let me know if you'd like to have it, and i'll send you the link.