The　multiple　sources　of　recycled　coarse　aggregates　and　the　complicated　service　condition　of　the　waste　concrete　structures　will　induce　obvious　variability　and　time-dependent　properties　of　recycled　aggregate　concrete　(RAC).　To　ensure　the　safety　and　reliability　of　RAC　components,　this　paper　takes　the　research　achievements　about　the　time-dependent　stress-strain　curve,　carbonation　behavior　and　cover　cracking　of　RAC　into　account.　Meanwhile,　based　on　the　analysis　of　the　time-dependent　reliability　of　RAC　components,　it　is　found　that　the　compressive　strength　of　RAC,　reinforcement　ratio,　thickness　of　concrete　cover,　carbonation　coefficient　and　corrosion　rate　of　reinforcement　have　significant　influence　on　the　reliability,　and　then　the　design　methods　of　ensuring　the　time-dependent　reliability　level　of　RAC　components　are　proposed.　Under　the　condition　that　the　RAC　has　the　same　standard　value　of　compressive　strength　as　that　of　the　normal　aggregate　concrete,　the　design　method　of　increasing　the　longitudinal　reinforcement/stirrup　ratio　of　RAC　components　is　proposed　with　the　determined　partial　safety　factor　of　RAC.　Simultaneously,　the　formulas　for　calculating　the　bearing　capacity　of　RAC　components　considering　the　time-dependent　reliability　are　recommended,　which　can　be　used　for　the　design　of　RAC　structures.　©　2020,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.