I want to "host" a blender file. I mean if antoher pc edit it I can see it from my PC. Is there any way to do that?
Maybe the best way is to have a master file, and split your scene into multiple assets (save as dedicated .blend), then use File > Link to show them into the master file.
The assets files can be directly saved on your local network (shared folder on your computer or shared network drive folder, can be slow), or cloud folder like Fowl suggest, or even better, using a versionning system like SVN.
Note that linked libraries have some limitations, but Blender users can hope for changes soon, with overrides.