3d coordinate

I see the top one i.e  Z forward, Y up in both versions.
Just in case there was something unusual, I just checked a few old independant tutorials out. The first two are CS6 the third is CC2019. They all show Y (green) up:

https://creativepro.com/using-3d-tools-photoshop-cs6-extended/

lhttps://layersmagazine.com/2d-to-3d-in-photoshop-cs6-extended.html

https://photoshopcafe.com/use-3d-photoshop-ultimate-tutorial/

Have you imported a scene in your second screenshot?
Dave

I've just gone back and checked and axis orientation in CS6 was the same as CC2019.
If you class Z as depth then that would match Photoshops alignment of Z to front and back with X left /right and Y up/down.

Dave

Hi

What do you mean by wrong?

If you mean Photoshop uses the convention of X and Z being on the groundplane and Y up/down whereas some other 3D applications, e.g. Blender, use X and Y on the groundplane and Z up/down,  then they are just conventions.  I suspect Photoshop's convention came from the application starting as a 2D image editor which puts the X and Y axis in the horizontal and vertical respectively. That left Z for the depth when 3D was added.

Dave