The muon monitor consists of two instruments: a silicon pad and a ionization chamber detectors. These devices are placed right after a thick beam dump to stop most of protons in the intense proton beam as well as secondary pions and low energy muons from pion decays or neutrino interactions in the dump. Only the muons with their energy greater than 5.5 GeV manage to penetrate the beam dump. Therefore these devices can only monitor the flux of high energy muons as a function of the phi and the radial distance from the beam axis. This flux information allow us to fine tune the beam simulation code.