According to one implementation, a blast treatment device includes at least one nozzle, a movement structure and at least one weight member. The at least one nozzle injects blast media. The movement structure reciprocates the at least one nozzle along a track. The at least one weight member cancels a vibration caused by reciprocating the at least one nozzle. Further, according to one implementation, a blast treatment method includes injecting blast media from at least one nozzle; manufacturing a blast treated product by reciprocating the at least one nozzle along a track; and canceling a vibration, caused by reciprocating the at least one nozzle, by at least one weight member.