Although many researches on earning management have been investigated for the past twenty years, they are mainly based on the Modified Jones Model proposed by Dechow, Sloan and Sweeney. However, due to the changes in industrial environment, and varied aspects among different enterprises in Taiwan, whether the Modified Jones Model remains the most appropriate and predictable one is to be further investigated. In addition, this paper also intends to conduct an empirical study based on Modified Jones Model to examine the following issues. First, the best time to operate quarter earning management. Secondly, the accounts used to manipulate for those declined companies in the electronic industry in Taiwan. This empirical study found that the industry model is very useful to detect the contents of information of the earnings management accounting. However, the modified Jones Model does not display the maximum detection effect as expected. At the same time, this study also found that the DeAngelo Model could not detect the contents of information of the earnings management accounting in a effective way. To the management, four individual accounting items related to accountable items are often used to get control of the earning items: Account receivable, account payable, pre-paid items, and depreciation ones. Taiwan's listed companies in electric industry always take advantage of the motives and operation strategies based on decisive accountable items while their sales performance is recessive. Furthermore, they always take the first three quarters as the main targets instead of the third quarter as the main control target.