The purpose of this research was to study the development of the office of accounting professional services in Thailand with the concept of intellectual capital towards the ASEAN Economic Community. The quality accounting offices were research samples which were representative of quality accounting offices in Thailand that can continue to perform professionally and successfully. Which found that quality accounting offices had applied the concept of intellectual capital It consists of 4 components namely human capital social capital structural capital and spiritual capital. They applied to the operation and management of the quality accounting office If the accounting firms in Thailand have applied the intellectual capital to their accounting firm they will be able to succeed in the accounting profession as well. Therefore based on this research the model for the development of the Office of Professional Accounting offices in Thailand is based on the idea of intellectual capital.

The purpose of this study is to study the factors that affect the accounting performance of the quality accounting office. The population group is the accountants operating in the 160 quality accounting firms. 115 sample are collected and the sample size is calculated using Taro formula. The data is analyzed using descriptive statistics including frequency percentage mean and standard deviation and inferential statistics including Independent sample T-test One Way ANOVA Pearsons Correlation Coefficient and Multiple Regression Analysis. The study results showed that of the overall and individual motivation factors Motivation factors and Supporting factors affected the accounting performance of the quality accounting offices at the highest level while the sample group had accounting skills in general in the highest level. The hypothesis testing found that 1) age education level and the different incomes affected the efficiency of accounting operations of different quality accounting firms 2) Motivation and Supportive factors had no influence on the efficiency of accounting performance of quality accounting firms and 3) professional knowledge professional skills and professional attitude had a positive influence on the efficiency of accounting operations of the quality accounting offices.