With　the　development　of　the　Internet　of　Things　technology,　smart　agriculture　has　attracted　wide　attention.　The　IoT　project　based　on　the　multi-source　data　fusion　algorithm　and　the　Harmony　system　provides　a　more　convenient　and　fast　way　for　the　actual　production　of　agriculture.　By　detecting　the　multi-source　environmental　information　in　the　production,　such　as　carbon　dioxide　concentration,　light　intensity,　air　humidity,　etc.,　the　data　is　processed　by　using　the　multi-source　data　fusion　algorithm.　Through　Huawei　Harmony　OS　we　can　build　a　smart　agriculture　app　and　can　through　the　BearPi-HM　Nano　connection　sensor　and　preliminary　prove　the　feasibility　of　comparison　in　this　direction　of　innovation,　this　can　timely　and　reliably　guide　agricultural　practitioners,　reduce　the　waste　of　manpower　and　material　resources　in　agricultural　production.　©　2023　SPIE.