An unmanned flying object control assistance system, comprising: a simulation apparatus, comprising: a data acquiring section configured to acquire past weather data and terrain profile data, a simulation processing section configured to perform a wind condition simulation of wind conditions in a wind condition estimation area on the basis of the acquired past weather data and the acquired terrain profile data, an analysis processing section configured to perform a flow field feature analysis of wind conditions of the wind condition estimation area obtained as a result of the wind condition simulation, to generate analysis result sets, and to store the analysis result sets in an analysis result database, a wind condition estimating apparatus, comprising: a data acquiring section configured to acquire weather forecast data and measured wind condition data, an analysis result acquiring section configured to acquire an analysis result set from the analysis result database on the basis of the acquired weather forecast data and the acquired measured wind condition data, a wind condition estimating section configured to estimate wind conditions of the wind condition estimation area for a time (t+1) after the passage of a predetermined time from the current time (t), an output processing section configured to output the estimated wind conditions to a drone control apparatus. a data acquiring section configured to acquire past weather data and terrain profile data, a simulation processing section configured to perform a wind condition simulation of wind conditions in a wind condition estimation area on the basis of the acquired past weather data and the acquired terrain profile data, an analysis processing section configured to perform a flow field feature analysis of wind conditions of the wind condition estimation area obtained as a result of the wind condition simulation, to generate analysis result sets, and to store the analysis result sets in an analysis result database, a wind condition estimating apparatus, comprising: a data acquiring section configured to acquire weather forecast data and measured wind condition data, an analysis result acquiring section configured to acquire an analysis result set from the analysis result database on the basis of the acquired weather forecast data and the acquired measured wind condition data, a wind condition estimating section configured to estimate wind conditions of the wind condition estimation area for a time (t+1) after the passage of a predetermined time from the current time (t), an output processing section configured to output the estimated wind conditions to a drone control apparatus. a data acquiring section configured to acquire weather forecast data and measured wind condition data, an analysis result acquiring section configured to acquire an analysis result set from the analysis result database on the basis of the acquired weather forecast data and the acquired measured wind condition data, a wind condition estimating section configured to estimate wind conditions of the wind condition estimation area for a time (t+1) after the passage of a predetermined time from the current time (t), an output processing section configured to output the estimated wind conditions to a drone control apparatus.