The invention discloses a fire rescue detection aircraft. The fire rescue detection aircraft comprises an aircraft body and a detection system. The aircraft body comprises a holder, a plurality of supporting arms, a protection cover, a rotor wing motor, a rotor wing, a first rotation shaft, a left undercarriage, a second rotation shaft, a right undercarriage, a first motor, a second motor and a rotatable detector. The rotatable detector comprises a rotatable detector outrigger and a rotatable detector body. The detection system comprises a central processing unit, an infrared thermal imaging lens, visible light camera lens, a laser range finger, a GPS positioner, a horn, a radio frequency antenna base and a radio frequency antenna. The invention further discloses a using method for the fire rescue detection aircraft. The design of the fire rescue detection aircraft is novel and rational, and can be conveniently realized. The service life is long, and the safety, the reliability and the stability of the working are high. The efficiency of rescuing a trapped person is improved, the practicability is strong, the using effect is good, and the promotion and use are convenient.