This paper proposes a new incremental weighted mining based on RFM ((Recency, Frequency, Monetary) analysis for recommending prediction in u-commerce. Association rules search for the associated item set on large database. Association rules are frequently used by the marketing pattern analysis in e-commerce, recommendation to promote for selling a product in marketing. The proposing method can extract frequent items and create weighted association rules using incremental weighted mining based on RFM analysis rapidly when new data are added persistently in order to predict frequently changing trends by emphasizing the important items with high purchasability according to the threshold for creative weighted association rules in u-commerce. To verify improved better performance of proposing system than the previous systems, we carry out the experiments in the same dataset collected in a cosmetic internet shopping mall. frequent scanning a large data, scalability and accuracy as well. It is crucial to have different weights for different transactions in order to reflect their different importance and to adjust the mining results by emphasizing the important transactions. We can improve the performance of recommendation through incremental weighted mining based on RFM analysis for recommending prediction in u-commerce so as to be able to generate the association rules. As a result, we propose a new incremental weighted mining based on RFM analysis for recommending prediction in u-commerce under ubiquitous computing environment. The next section briefly reviews the literature related to studies. The section 3 is described a new method for personalized recommendation system in detail, such as system architecture with sub modules, the procedure of processing the recommendation, the algorithm for proposing system. The section 4 describes the evaluation of this system in order to prove the criteria of logicality and efficiency through the implementation and the experiment. In section 5, finally it is described the conclusion of paper and further research direction.