Embodiments of the present disclosure provide a conveyer and a method of controlling the mentioned conveyer. In one embodiment, a conveyer includes: a support base; a roller assembly including a plurality of delivery rollers coaxially arranged, a plurality of lead screws and a plurality of screw motors respectively connected in a one-to-one correspondence with the plurality of lead screws, each of the delivery rollers being formed with at least one threaded hole, and being engaged with the corresponding lead screw of the lead screws through the threaded hole of the each of the delivery rollers; a driving shaft rotatably connected with the support base, the screw motors being provided on the driving shaft by fixing structures, wherein the delivery rollers are provided to be coaxial with the driving shaft; and a driver unit configured to drive rotation of the driving shaft.