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Nowadays, many studies of the discovery of needs and feelings of the hotel customers are not only around before-booking period, but also do not consider the privacy of customers completely. While the best period of studies of this knowledge are after the booking took place, there are two major problems for its unpopular: one is personal privacy, the other is not having a scientific and valuable approach. In this paper, we propose a novel approach to deal with the above existing problems. We employ intuitionistic fuzzy set, alpha-cuts, and Apriori algorithm to discovery the knowledge of needs and feelings of customers under an anonymous way. The approach is expatiated under different alpha by an example. And The yielded pattern and association rules have taken to the cooperative hotel more effects than before. So the approach is provable and valuable.