Embodiments provide a scout image scanning method and system. The method includes: selecting a scanning protocol to determine a scanning part of a target object looking up, in a first lookup table, a corresponding scanning length value based on the scanning part looking up, in a second lookup table, corresponding scanning parameters based on the scanning part and sign information of the target object and automatically setting a scout image scanning dosage based on the scanning length and the scanning parameters obtained from above looking up processes, and implementing a scanning process. Efficiency of the scout image scanning processes may be increased, dosages used therein may be reduced and thus reducing risks of hurting the target objects.
