Modern　urban　energy　system　with　renewable　energy　sources　has　become　an　effective　solution　to　enhance　energy　security　and　promote　carbon　neutrality.　This　paper　presents　a　holistic　framework　for　the　optimal　design　and　management　of　such　a　flexible　hybrid　power　system　at　the　community　scale.　This　framework　integrates　the　potential　assessment　of　rooftop　PV　and　waste　biomass,　a　general　optimization　approach　with　multi-perspective　performance　evaluation,　as　well　as　the　impacts　analysis　of　energy　policy,　demand　response,　and　uncertain　economic　parameters.　The　proposed　framework　was　applied　to　a　small　neighborhood　area　in　Beijing,　China.　It　was　found　that　100%　utilization　of　available　biomass　and　rooftop　PV　would　satisfy　73%　of　local　electricity　demand　with　the　levelized　cost　of　electricity　of　0.1030　$/kWh　and　the　embodied　carbon　emission　of　0.5416　kg/　kWh.　The　flexible　shiftable　load　could　lead　to　lower　peak　load　and　less　electricity　supply　cost,　and　help　to　match　the　energy　demand　with　the　dispatchable　rooftop　PV　output.　However,　the　economic　benefits　caused　by　implementing　demand　response　are　more　obvious　than　the　environmental　benefits.　Furthermore,　a　higher　electricity　tariff　and　lower　capital　cost　of　PV　technology　would　facilitate　the　investment　in　rooftop　PV　and　achieve　carbon　emission　reduction　targets.