This invention discloses a kind of garment steamer technology, which overcomes the defects of obvious condensation and return flow inside the steam duct and the low purity and temperature of steam. It comprises a main body, a steam duct and a brush head, being equipped with a water tank and a heating and vaporizing device inside, said heating and vaporizing device inside said main body comprising the first vaporizing device and the second vaporizing device, said brush head being equipped with the third vaporizing device; said first vaporizing device comprising a spiral vaporizing tube, an electric heating tube and a metal die cast; is provided with a water outlet pipe on the bottom, said water outlet pipe is connected with the water inlet of said spiral vaporizing tube via the pump. This product is featured by that the steam from said second vaporizing steam outlet has been provided with high purity and low humidity; after passing the third vaporizing device, the steam can be provided with guaranteed purity and temperature when being sprayed from the brush head, which greatly improves the ironing efficiency and effect of mites elimination and can be widely used in fashion stores, small clothing factories and some families with high requirements for dressing.