The utility model provides a nozzle structure, spray gun and spray gun system, wherein, the nozzle structure includes: nozzle body, nozzle body have the main part and link up the cavity of main part along the axis of nozzle structure, atomizing piece subassembly, but atomizing piece subassembly do not set up in the cavity around the axis rotation ground of nozzle structure, atomizing piece subassembly include first atomizing piece and with the second atomizing piece of the coaxial setting of first atomizing piece, the sense of rotation of first atomizing piece and the rotation opposite direction of second atomizing piece. The utility model provides a nozzle structure among the prior art problem poor to the atomization effect of fluid.