If you refer to someone's mind-set, you mean their general attitudes and the way they typically think about things.
例句
The greatest challenge for the Americans is understanding the mindset of Eastern Europeans...对于美国人来说，最大的挑战在于理解东欧人的思维方式。The modern athlete's mind-set is, 'I'm going to make as much as I can now and not worry about the future.'当今运动员的一贯想法是：“现在只管尽自己最大努力，而不去担心日后会怎么样。”
英汉词典释义
n.
观念模式;思维倾向;心态
This old mindset has not changed.这个旧的思想意识还未改变
英英词典释义
Noun
1. a habitual or characteristic mental attitude that determines how you will interpret and respond to situations