If i have 3d point co-ordinate than How to know that it is lying on which face,edge, or surface?

[lgangwar]

It is not fixed that it will lie on face, edge or surface but it is sure that it is on the part somewhere.

[TomasLoun]

ProGeometryAtPointFind - you have already mentioned it in another topic.
If it is not laying on any surface or edge, you can parse the model and use ProSurfaceParamEval or ProEdgeParamEval - it will tell you the closest point on the given surface or edge, so you can calculate its distance.