PROBLEM TO BE SOLVED: To accurately select teaching materials for explaining work contents to a plurality of workers at the same time according to the composition of workers and other on-site circumstances. On-site work support device, on-site work support method and on-site work. Provide a support program. SOLUTION: Before explaining the construction contents, the explainer selects a video to be reproduced at the time of explanation. The procedure of the video selection process is as follows. S201 that accepts the input of the working member. S202 that accepts process input. S203 that acquires the achievement history, education history, achievement blank, and education blank of the working member, and determines the candidate of the video to be reproduced. S204 that accepts danger prediction information for the day. S205 to review the candidates for the video to be played based on the danger prediction information. S206 that accepts the selection of the video to be played. S207 that accepts the time limit. S208 that reviews the scheduled playback video based on the time limit. S209 to determine the image of the house to be regenerated. [Selection diagram] Fig. 6
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