Multifunctional　neuromorphic　devices,　integrating　the　acquisition,　computation,　and　processing　of　information,　have　exceptional　advantages　to　simulate　biological　behaviors　and　become　one　of　the　foundations　of　future　neuromorphic　computing.　However,　the　realization　of　sensor-memory-calculation　in　a　single　device　remains　a　great　challenge.　Herein,　memory-synaptic　hybrid　optoelectronic　transistors　were　developed　with　hydrolyzed　silica-coated　lead-free　double　perovskite　Cs2AgBiBr6　and　organic　semiconductors,　which　exhibited　sensor-memory-calculation　behavior.　This　work　offers　a　novel　strategy　for　constructing　multifunctional　neuromorphic　devices,　which　will　further　inspire　the　development　of　floating-gate　device　in　future　neuromorphic　computing.