A new and elegent technique for automated phase evaluation referred to as carrier phase shifting holographic interferometry is proposed. The key features of the technique are as follows. The fringe patterns with different phase shift can be reconstructed from a double exposures hologram. Thus it can be used for automated phase evaluation to time dependent problems. Although, the fringe patterns with different phase shift are readout from different places on the hologram, they can be exactly overlaped. This cancels the positioning problem faced by multiple channels phase shift methods. It provides live phase shift fringe patterns because the fringe patterns with continously phase shift can be observed as the reconstructing laser beam moves. Principle of the technique as well as its experimental demonstration is presented.