A Shark-Hattman wave front sensor adapted for background variety point source target wave front detection is disclosed that comprises restraint system, lense array, coupling lens array, detector and algorithm optimization module, the electrical signal collected by detector firstly comes into the algorithm optimization module to be processed, and then transferred into post-treatment system, said algorithm optimization module is various solidified fast mass center algorithm and digit hardware module of related algorithm, it can proceed the algorithm preelection based on the background intensity, signal-to-noise ratio is the criterion, when the signal-to-noise ratio is lower than the set criterion value, the related algorithm is chosen, otherwise, the mass center algorithm is chosen to realize the weak and strong background monitoring of adaptive optical system. The invention eliminates the influence of strong detecting background to the detecting accuracy, and has advantages of simple structure, stable working properties, sophisticated machining technology, simplifies the production, installation and adjustment, it is benefit for batch production.