A central feature of accounting in today’s business world is the integration of accounting professional with the computerized-base information system. One of opportunities to conduct this strategic activity is adopting accounting packaged software in the company. However, the high failure and unsatisfied rate of the implementation has made all people involved intensively and comprehensively consider all factors impact on implementation success. This is an “invisible” process that faces the gap between software vendor’s views and adopting company’s management requirements. This process also requires the characteristics of adaptation from human factor as well. The results from the survey of 68 companies adopting accounting packaged software in HCMC, Vietnam show that the level of software fit, organizational resistance and the interaction among of them play the significant roles in the implementation success. The study results will address some managerial suggestions in the contribution to accounting packaged software implementation success in Vietnam.