Spectrum quality evaluation method and system for power wireless private network

The invention relates to a frequency spectrum quality evaluation method and a system for a power wireless private network. The method comprises the steps of determining an equivalent SINR value of theresource block group corresponding to each measurement point according to the signal to interference plus noise ratio SINR value of each carrier in the resource block group corresponding to each measurement point, and measuring a coverage range equivalent to the optimal equivalent SINR value in the equivalent SINR values of the resource block group corresponding to each measurement point; determining the probability that n continuous time intervals of the resource block group corresponding to each measurement point do not contain noise according to the probability that the resource block group corresponding to each measurement point does not contain noise in a single time interval; determining a correction amount of a channel quality indicator (CQI) value corresponding to an optimal equivalent signal to interfere