Performance based budgeting approach integrate performance and budget. This approach relate budget fund to organization performance and expected result clearly. The purpose of this research is comparative study of public sector budgeting system with performance based budgeting. This research is mixed (qualitative-quantitative) study. In qualitative phase literature review and deep interview methods and in quantitative phase variable -oriented comparative approach was used. Statistic samples in qualitative phase was 8 experts in public finance and in quantitative phase was 50 budget manger in branches. Finally, thematic analyze and compare mean and ANOVA were used in qualitative and quantitative phases respectively. The findings show that budgeting system in public finance in some components such as strategic planning, control and monitoring, and performance auditing is consistent with performance based budgeting, and in some components such as responsibility and motivation system, costing, performance based planning, change management and documentation, and performance management requires adjustment and enforcement.