The present application provides a frequency-domain resource configuration method, apparatus, and system, said method comprising : a terminal receiving first indication information sent by a network device, said first indication information being indicating a first frequency-domain resource; determining the size of a first target frequency-domain resource that may be used for uplink service transmission; according to the size of said first target frequency-domain resource, determining a second frequency-domain resource from the first frequency-domain resource, the size of said second frequency-domain resource being equal to the size of the first target frequency-domain resource; according to the second frequency-domain resource, sending the uplink service to the network device. The first frequency-domain resource is indicated to the terminal by the network device, and is no longer fixed and unchanging; Therefore the terminal may determine, from a variable first frequency-domain resource, a frequency-domain resource suitable for sending an uplink service; thus the probability of collision of the uplink service transmission of each terminal is reduced, the time delay is reduced, andnetwork resources are conserved.