I want to ask this that there is any way to make 3d maps
Not with RPG-Maker.
There are some scripts that simulate a flat 3D (like the said mode 7 script) or that make a 3D-dungeon-view like the very old RPG's, but none of them are really 3D like the example in the picture.
You can do it, but it will probably cost a lot of processing power, a number of different scripts and lots of graphical resources needed to be done that it won't really be advisable