One way to find the best undergraduate engineering schools is to read U.S. News & World Report's annual rankings. Business Insider did a ranking of engineering schools in 2014. Another way to find the best school is to check schools individually for those that have features important to the student.
U.S. News & World Report ranks undergraduate engineering schools solely by survey responses from engineering school deans and faculty. Only schools that the Accreditation Board for Engineering and Technology accredits appear for consideration on the surveys. The surveys also ask for rankings of specialties within engineering, such as chemical and civil engineering.
One criterion that Business Insider uses is the number of graduates who were employed at top tech companies such as Google, Facebook and Apple.
A student might have other criteria for what constitutes the best engineering schools, such as course offerings, professorial projects of interest and local tech companies that hire the school's graduates. For these things, students must research the schools directly.