The embodiment of the invention discloses a frequency point scanning method, processor, device and system for LTE (long term evolution). The frequency point scanning method comprises the steps of acquiring power of subcarriers in a frequency band, and calculating the average power of the subcarriers in the frequency band by taking a resource block as a unit; determining a candidate frequency point set in a candidate frequency point region according to a preset step, wherein the candidate frequency point region comprises the resource blocks meeting a preset number requirement, and the average power of the subcarriers in the frequency band of the resource blocks is more than a judgment threshold; and eliminating the frequency points, which do not meet the power detection conditions on principle synchronous signs PSS and secondary synchronous signs SSS, in the candidate frequency point set, and demodulating failed false frequency points by demodulating a physical broadcast channel (PBCH) to obtain frequency point scanning results. The frequency point scanning method overcomes the defect of long time for scanning the frequency points in a broad band one by one in the prior art, and can obtain the frequency point scanning results in the eligible candidate frequency point region and eliminate the influence of other dynamic allocation channels on power, so that the accuracy of the candidate frequency points is enhanced.