A neutron capture therapy system comprising: a neutron generating device comprising an accelerator and a target, wherein a charged particle beam generated by acceleration of the accelerator acts with the target to generate a neutron beam; a beam shaping assembly comprising: a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterised in that the neuron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall, wherein the reinforcing portion comprises a first reinforcing portion and a second reinforcing portion, the first reinforcing portion is disposed in the concrete wall, and the second reinforcing portion at least partially extends from the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti. a neutron generating device comprising an accelerator and a target, wherein a charged particle beam generated by acceleration of the accelerator acts with the target to generate a neutron beam; a beam shaping assembly comprising: a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterised in that the neuron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall, wherein the reinforcing portion comprises a first reinforcing portion and a second reinforcing portion, the first reinforcing portion is disposed in the concrete wall, and the second reinforcing portion at least partially extends from the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti. a moderator configured to moderate the neutrons generated from the target to an epithermal neutron energy range, a reflector surrounding the moderator, wherein the reflector directs deviating neutrons back to the moderator to enhance intensity of an epithermal neutron beam, a thermal neutron absorber provided to absorb thermal neutrons to avoid overdosing in superficial normal tissues during treatment, a radiation shield provided to shield leaking neutrons and photons so as to reduce dose to normal tissues in a non-irradiation area, and a beam exit, wherein the radiation shield around the beam exit is disposed at the rear of the reflector; characterised in that the neuron capture therapy system further comprises a concrete wall accommodating the neutron generating device and the beam shaping assembly; and a reinforcing portion at least partially disposed in the concrete wall, wherein the reinforcing portion comprises a first reinforcing portion and a second reinforcing portion, the first reinforcing portion is disposed in the concrete wall, and the second reinforcing portion at least partially extends from the concrete wall; wherein the concrete wall and the reinforcing portion are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti.