The present invention relates to a blast wall having ventilation function, an explosion-proof system thereof, and an offshore structure including the same. According to the present invention, the blast wall comprises: a fixed wall fixed between modules installed for explosion-proofing while maintaining a safety gap, and having one or more ventilation holes formed thereon; a ventilation hole opening/closing unit installed to open/close the ventilation hole of the fixed wall so as to control the opening ratio of the ventilation hole of the fixed wall; and a control unit to control the ventilation hole opening/closing unit in real time in accordance with a surrounding weather condition. Accordingly, provided are advantages of solving a ventilation problem of a conventional blast wall and reducing the safety gap to the shortest distance.;COPYRIGHT KIPO 2018
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