Orchid is one of the economic crops in world market. The varieties of shape, style, color and smell of orchids attract people to create products in many ways, such as cut orchid, orchid plant, bouquet, lei, corsage, and orchid loose bloom and so on. Thailand is one of the biggest exporters in orchid market. There are a lot of processes in the chain, such as reproduction, cultivation, market trend survey and analysis, transportation, international trade standard, traceability and so on. In order

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... to provide a smart knowledge service, we have to 1) managing knowledge efficiently in terms of sharing and reusing knowledge and 2) providing knowledge which matches to stakeholders. In this paper, we propose a general framework on ontology base orchid cluster platform for developing a usercentric model of knowledge services in orchid cluster. We give some examples on semantic search model, recommended system model and tracking and monitoring model respectively. knowledge service, ontology and model, orchid cluster platform I.