Abstract: The 14 MeV neutron yield measurement with intense generator is introduced.Because of no experience of determination for 10~(12) n/s fluence rate neutron source.a intercomparasion of measurements is carried out by three methods of sevensets of devices. Although the background of neutron, γ rays and electro-magnetieinterference is very strong during the measurements, reasonable result is obtain-ed. The coincident results measured by recoil proton telescope (45°) and fissionchamber of ~(238)U showed two sets of equipments are ary stable in largefluence range.