The high purity molybdenum (Mo) sample were irradiated with the Nd∶YAG pulse laser to generate plasmas in a vacuum chamber. The time integrated emission spectroscopy of laser produced Mo plasmas was measured in the spectral range of 2~9 nm using different laser power density. Based on collision-radiative model (CRM) and unresolved transition arrays (UTA) data of highly charged Mo ions calculated with Cowan code, the theoretical synthetic spectra at different electron temperature and electron density were obtained assuming individual spectral line obeyed Gaussian broadening. Fair agreements between simulated and experimental spectra have been achieved. Experimental and theoretical spectra show that the UTAs of 3d—4f transitions in Mo ⅩⅥ-ⅩⅫ ions have several peaks lying in water window region. By controlling the laser pulse parameters and optimizing the plasmas confinement conditions, it is expected to obtain high ion fraction of highly charged Mo ions irradiating photons in water window wavelength region, showing the potential for water window living cell microscopic imaging sources in the future.