I created a view entity using ent_createlayer(...), and I want to remove it from the level, but the ent_remove(...) can't do it , is there any other method ?

ent_remove doesnt work? Should do. Double check the pointer you are using to try to remove it.
Otherwise try PTR_REMOVE().

I used ent_remove(), and if the view entity had been removed , it won't be visible, but it was visible. It's like that ent_remove() only removes the entity in the level, not the view entity.
My GameStudio is A6.5 , there isn't the function PTR_REMOVE().
Thank you!

OK, then try ent_remove followed by a wait(1);
It may be a screen-refresh thing.

If still no luck, post the whole function/action please.

The tutorial says:
"ent_remove(ENTITY* entity);
Removes a level entity out of the level.
Parameters:
entity - Pointer to the level entity to be removed. "

if I use a pointer to the view entity as the parameter, teh engine show me an error.

Can I see some code?

At least the lines surrounding the ent_create, and the lines surrounding the ent_remove,
if there is a lot of "stuff" there.

My demo is that: a car drives in a level, there are some other models in the level and a map on the screen to display the suroundings around the car.
So the map should displays the other models on it and I use ent_createlayer(...) to create view entities representing the models on the map. The function ent_create(...) only create entity in the level, here my view entities are on the map(screen).
Thank you very much!