Disclosed are a method and an apparatus for acquiring inventory data, a terminal device and a computer-readable storage medium. The method comprises: receiving a request for inventory data sent by a terminal device, where electronic tag data of the target item being carried in the request for inventory data; according to the inventory data request, searching among inventory record data pre-stored in a blockchain network for target inventory data corresponding to the electronic tag data, where the target inventory data being corresponding to the target item; and sending the target inventory data to the terminal device.