Monitoring　temperature　change　in　the　distribution　process　is　one　of　the　crucial　points　to　guarantee　the　safety　and　efficacy　of　temperature-sensitive　products　such　as　drugs,　vaccines,　and　foods.　The　traditional　time-temperature　indicators　(TTIs)　for　this　work　are　digital　thermometers.　However,　due　to　their　high　cost,　only　a　few　digital　sensors　can　be　mounted　in　each　refrigerator　car.　It　is　not　possible　to　record　the　situation　of　each　individual　products.　In　addition,　the　time-temperature　history　curves　measured　by　digital　thermometer　are　easy　to　be　tampered,　limiting　their　application　on　indicating　the　validity　of　products.　Although　some　low-cost　and　disposable　chemical　or　physical　TTIs　have　been　reported,　they　always　work　based　on　only　one　parameter　to　indicate　the　experienced　highest　temperature,　which　cannot　indicate　how　long　does　the　products　experience　in　different　temperature.　Here,　multicolor　plasmonic　hydrogels　allowing　the　in-situ　formation　of　gold　nanoparticles　have　been　fabricated　as　the　full-history　time-temperature　indicator　(FHTTI).　Different　from　traditional　indicators,　the　two-dimensional　FHTTI　can　separately　indicate　temperature　and　time　with　two　non-interfering　parameters:　color　and　length,　which　guarantees　the　accuracy　and　completeness　of　reported　time-temperature　information.　The　FHTTI　has　achieved　to　monitor　the　time-temperature　changes　up　to　more　than　30　days　under　complex　variable-temperature　conditions,　showing　great　application　potentials　for　the　accurate　full-history　time-temperature　indication　of　each　single　packaged　product　in　cold　chain　logistics.　©　2022　Elsevier　B.V.