How can I solve a heat transfer problem in Finite element method using ANSYS ?

It can be solved using a CFD analysis in Ansys Workbench using CFX or FLUENT (if u want to analyse the flow of fluid).

IF u want to analyse the structure in which the fluid is flowing then u can use Static and Transient Thermal Analysis...

Hope this is useful : )

Dear Jihad,

 You can use Ansys CFX or Fluent to solve your problem. On the other hand,  could you describe further your particular case? otherwise it is a general question. Thanks.

Setup the Geometry and Mesh steps then either use CFX or Fluent, also in the geometry section if you have Heat and Mass transfer you need to setup an enclosure for inlet/exit and walls