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A general method to realize arbitrary dual-band independent phase control is proposed and demonstrated in this paper.A double-layered C-shape reflective meta-atom is designed to realize independent phase control with high efficiency.As a proof of concept,we propose two functional metasurfaces in the microwave region;the first metasurface performs beam steering in different directions,and the second metasurface generates achromatic beam steering at two distinct frequen-cies.Both simulation and measurement results agree well with the theoretical pre-setting.The maximum measured effi-ciency is 88.7％ and 92.3％ at 6.8 GHz and 8.0 GHz,respectively,for one metasurface,and 91.0％ and 89.8％ at 6.9 GHz and 8.6 GHz,respectively,for the other.