The IFMIS has not been a success in Africa and Kenya in Particular .Why it was unsuccessful in the continent is unknown .This study therefore, aims at examining to assess the effect of IFMIS use : case of Government Treasury. Much attention is directed towards the public sector. The study seeks to address: the efficiency of IFMIS in delivery of services in Government Treasury ,the accuracy of IFMIS in dissemination of information and lastly to underpine DeLone and McLean model in assessing the overall use of IFMIS in Government Treasury .The research subjected eight constructs from Delone & Mclean model. Data was adopted from the public sector by a Thesis where Government Treasury was as sector . Findings indicated that: RMSEA yielded the results of (0.027) which was < 0.05 indicating a good fit, hence IFMIS use agrees with the rule of thumb ,NFI yielded (0.98) and GFI (0.99) both results were > 0.9 indicating a better fit . On efficiency the results yielded a minimal error difference of 2% when the two models were compared, IFMIS use indicated a workable efficiency though not very accuracy in dissemination of information. Results also established that there was strong significant effect between the use of IFMIS and Information Quality (R= 0.708) with sig (.000), however a weak significant effect was yielded by Service Quality (R = 0.142) with sig (.004) on use of IFMIS at the Government Treasury .This research recommends future analysis by a technique of Bootstrapping in AMOS with comparison of various models .All in all this research contend that Delone & Mclean model Path diagrams has shown lower error disagreement on testing the effect of IFMIS Use and hence stand the time in Confirming that IFMIS use contributes to the Government Treasury to a certain percentage but the system is not very accuracy. Recommendation:¬¬__