National reform may take about 10 years and public acceptance and participation are the key to its success, said Thienchay Kiranandana, chairman of the National Reform Council (NRC).
Looking back at the NRC's achievements in 2014, Mr Thienchay said the council brainstormed ideas this year and next year would see serious implementation of them.
In 2015, the NRC will lay the groundwork for national reform. It will also study the draft constitution and comment on it, he said.
Mr Thienchay also said if the draft constitution was not much criticised, a referendum might be unnecessary.
A referendum would delay the next general election and there would be complications if people rejected the draft charter in the referendum, he said. However, the decision on the issue rested with the National Council for Peace and Order and the government.
He urged people to pay attention to national reform, saying people's long-standing ignorance about national interest had brought about national crises.
Therefore, public acceptance and participation are important to the success of national reform, Mr Thienchay said.