Embodiments of the present invention provide a wireless communications method and system, a network device, and user equipment. The method includes: sending, by a network device, resource configuration information to user equipment, where the resource configuration information indicates a first transmission resource corresponding to first transmission, and a unit duration for occupying the first transmission resource for the first transmission is less than 1 millisecond; and communicating, by the network device, with the user equipment based on the first transmission resource. In this way, a transmission delay can be shortened, user experience can be greatly improved, and performance of a wireless network can be greatly enhanced.