A neutron capture therapy system, comprising: a neutron generating device and a beam shaping assembly, wherein the neutron generating device comprises an accelerator and a target that are configured so that a charged particle beam generated through acceleration by the accelerator acts with the target to generate a neutron beam, wherein the beam shaping assembly comprises a reflector, a moderator, a thermal neutron absorber, a radiation shield, and a beam exit, the moderator being configured to slow down neutrons generated from the target to an epithermal neutron energy range, wherein the reflector surrounds the moderator and is configured to guide deviated neutrons back to the moderator to increase the intensity of an epithermal neutron beam, wherein the thermal neutron absorber is configured to be used to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, wherein the radiation shield is configured to be used to shield leaking neutrons and photons to reduce a dose of a normal tissue in a region not exposed to irradiation; a concrete wall forming a space for accommodating the neutron generating device and the beam shaping assembly, and a support module disposed in the concrete wall, wherein the support module is capable of supporting the beam shaping assembly and is configured to be used to adjust the position of the beam shaping assembly, and the support module comprises concrete and a reinforcing portion at least partially disposed in the concrete; and an irradiation room and a charged particle beam generation room, wherein the irradiation room and the charged particle beam generation room are spaces formed by the concrete wall; wherein the charged particle beam generation room at least partially accommodates the accelerator, and the support module and the beam shaping assembly are at least partially accommodated in a partition wall between the irradiation room and the charged particle beam generation room. a neutron generating device and a beam shaping assembly, wherein the neutron generating device comprises an accelerator and a target that are configured so that a charged particle beam generated through acceleration by the accelerator acts with the target to generate a neutron beam, wherein the beam shaping assembly comprises a reflector, a moderator, a thermal neutron absorber, a radiation shield, and a beam exit, the moderator being configured to slow down neutrons generated from the target to an epithermal neutron energy range, wherein the reflector surrounds the moderator and is configured to guide deviated neutrons back to the moderator to increase the intensity of an epithermal neutron beam, wherein the thermal neutron absorber is configured to be used to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, wherein the radiation shield is configured to be used to shield leaking neutrons and photons to reduce a dose of a normal tissue in a region not exposed to irradiation; a concrete wall forming a space for accommodating the neutron generating device and the beam shaping assembly, and a support module disposed in the concrete wall, wherein the support module is capable of supporting the beam shaping assembly and is configured to be used to adjust the position of the beam shaping assembly, and the support module comprises concrete and a reinforcing portion at least partially disposed in the concrete; and an irradiation room and a charged particle beam generation room, wherein the irradiation room and the charged particle beam generation room are spaces formed by the concrete wall; wherein the charged particle beam generation room at least partially accommodates the accelerator, and the support module and the beam shaping assembly are at least partially accommodated in a partition wall between the irradiation room and the charged particle beam generation room.