The　construction　of　cable　net　structures　is　intricate,　and　the　construction　process　itself　is　laborious.　Conventional　safety　control　measures　during　the　construction　of　cable　net　structures　involve　monitoring　cable　forces　and　deformations　at　specific　moments　during　the　construction　steps.　However,　these　measures　do　not　guarantee　adequate　safety　assurance.　This　paper　proposes　a　method　for　the　safety　control　of　cable　net　structures,　considering　spatiotemporal　changes,　based　on　the　concept　of　digital　twins.　This　method　enables　real-time　monitoring　and　control　of　the　cable　net　construction　process　onsite,　facilitating　a　comparative　analysis　between　the　mechanical　and　geometric　information　of　the　construction　site　and　the　real-time　finite　element　simulation　results.　Such　an　approach　ensures　safety　control　throughout　the　construction　process.　Firstly,　a　twin　model　framework　for　safety　control　is　established.　Then,　the　methods　for　spatiotemporal　representation,　data　collection,　and　processing　at　the　construction　site　are　analyzed.　Finally,　the　proposed　method　is　validated　through　its　application　to　the　Xiaotian　Cultural　and　Sports　Park　project.　The　results　demonstrate　that　this　method　can　achieve　real-time　monitoring　and　control　of　cable　net　structure　construction.