I am learning node.js these days. I have gone through some nodeJS framework as well like expressJS and sailsJS but not able to decide which framework should I choose?
I suggest to use sails.js , as it has better MVC structure and If you take Sails.js, then you are still on Express. It also give you a base architecture and good start points for your projects.
Better go through this link and decide : http://www.quora.com/Should-one-learn-Express-js-or-Sails-js
You need to be at least familar with Express.js - it's like a standart now.
I would also suggest you to use sails.js as Sails makes it easy to build custom, enterprise-grade Node.js apps. Rest you can have a look on this:
http://vschart.com/compare/sails-js/vs/express-web-framework
来源：https://stackoverflow.com/questions/32474970/should-i-learn-express-js-or-sails-js