The present invention discloses a method, a device and a system for checkout, and belongs to the technical field of vision identification. A checkout method comprises: acquiring an identity information of a purchaser; identifying a take-up action or a put-back action of the purchaser to acquire an action identification result, and items at which the take-up action or the put-back action aims to acquire an item identification result; and performing checkout based on the identity information, the action identification result, and the item identification result of the purchaser. A checkout device comprises: an acquisition module, an identification module and a checkout module. Another checkout device comprises: a shelf, a range sensor, an identity verification collection module, an identification image collection module, a processor and a memory. A checkout system comprises: a client terminal and the checkout device. According to the present invention, the selling procedure is friendly, and the customer's experience is good. A plurality of various items is available in one transaction, and the purchasing procedure is convenient and fast.