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In this paper, the holographic dark energy in Brans-Dicke theory is confronted by cosmic observations from SN Ia, BAO and CMB shift parameter. The best fit parameters are found in 1σ region: Ω_h0=0.683^+0.035_-0.038, c=0.605^+0.138_-0.107 and α=0.00662^+0.00477_-0.00467 (equivalently ω=905.690^+637.906_-651.471 which is less the solar system bound and consistent with other constraint results). With these best fit values of the parameters, it is found the universe is undergoing acceleratedarXiv:0905.4174v1 fatcat:gtctmx3asraqjf42xoadhuxl4e