"The monarch, the boat also; People, water also; Water can carry a boat or overturn it. " To this end, the ruling measures taken by Emperor Taizong were: reducing punishment, lenient administration and ensuring the people, neglecting taxes and paying no attention to the rest. At the same time, Emperor Taizong not only attached importance to strengthening national defense and calming down border incidents, but also devoted himself to improving ethnic relations, communicating with border ethnic minorities and living in peace.

Emperor Taizong knew that "winning the people is the most important thing in politics". To make the general plan of governing the country go smoothly, the key is to recruit talents, know people and be good at their duties. Therefore, regardless of generation and family background, people who have the skills of governing the country and keeping the country safe are entrusted with heavy responsibilities.

Emperor Taizong can still be prepared for danger in times of peace, always thinking about long-term stability. He often encouraged his lieutenants to speak out and pointed out the emperor's mistakes, so that he could modestly and bravely turn over a new leaf.