  We theoretically demonstrate that a ferromagnetic/superconductor junction on
the surface of three-dimensional topological insulators (3D TIs) has an
anisotropic angle-dependent Andreev reflection when the in-plane magnetization
has a component perpendicular to the junction. In the presence of in-plane
magnetization, the Dirac cone's location adjusts in the $k$-space, whereas its
out-of-plane component induces a gap. This movement leads to the anisotropic
angle-dependent Andreev reflection and creates transverse conductance flows
parallel to the interface. Also, an indirect gap induces in the junction, which
removes the transport signatures of Majorana bound states. Because of the full
spin-momentum locking of Dirac fermions on the surface of 3DTIs, a torque that
called \textit{Andreev Transfer Torque} (ATT) imposes on the junction.
Moreover, we propose a setup to detect them experimentally.
