Heat　flux　manipulation　based　on　thermal　metamaterials　under　diffusive　heat　conduction　has　been　ex-tensively　studied　due　to　their　extraordinary　potential　in　energy　utilization.　However,　the　requirement　of　extreme　material　parameters　or　even　infinite　singularity　may　significantly　limit　their　practical　applica-tions.　In　this　work,　we　propose　a　new　method　for　uniformly　designing　thermal　cloak　and　concentrator　with　interconnected　structure.　The　condition　for　realizing　the　undisturbed　temperature　distribution　of　the　background　medium　in　thermal　cloak　is　strictly　deduced.　Through　adjusting　two　geometric　parameters　of　the　interconnected　structure,　we　analytically　demonstrate　that　the　thermal　cloak　and　concentrator　are　realizable,　where　the　heat　flux　can　be　shielded　or　concentrated　in　the　target　region.　The　desired　ther-mal　functionalities　are　confirmed　both　by　the　finite　element　simulations　and　heat　transfer　experiments.　Furthermore,　the　results　of　interconnected　structure　are　in　excellent　agreement　with　that　of　conventional　thermal　devices,　and　demonstrate　that　the　interconnected　structure　provides　an　efficient　method　for　ma-nipulating　heat　flux　over　a　very　wide　range　(from　cloaking　to　concentrating)　despite　having　a　simple　composition　and　structural　characteristics.　The　feasibility　of　interconnected　structure　can　enhance　the　se-lection　of　bulk　natural　materials　in　addition　to　easy　manufacturability　for　the　heat　flux　manipulation,　which　might　be　extended　to　other　disciplines,　such　as　electromagnetics　and　acoustics.　(c)　2022　Elsevier　Ltd.　All　rights　reserved.