The names of top ranked Engineering School or Universities in the World as you want to make a career in Engineering field only so want to study in top Engineering School only are as follows:

Massachusetts Institute of Technology (MIT)
Stanford University
University of California, Berkeley
University of Illinois at Urbana-Champaign
The University of Texas at Austin
The Imperial College of Science, Technology and Medicine
Georgia Institute of Technology
University of Michigan-Ann Arbor
Carnegie Mellon University
Texas A&M University
Nanyang Technological University
Tsinghua University
University of Cambridge
Swiss Federal Institute of Technology Lausanne
University of California, San Diego
Pennsylvania State University - University Park
National University of Singapore
University of California, Santa Barbara
Purdue University - West Lafayette
California Institute of Technology
Northwestern University
Princeton University
Harbin Institute of Technology
University of Toronto
Harvard University
University of Southern California
City University of Hong Kong
Shanghai Jiao Tong University
University of Minnesota, Twin Cities
University of California, Los Angeles
University of Maryland, College Park
North Carolina State University - Raleigh
Pierre and Marie Curie University - Paris 6
University of Washington
The Ohio State University - Columbus
Swiss Federal Institute of Technology Zurich
Cornell University
Technical University of Denmark
Tohoku University
The Hong Kong University of Science and Technology
The University of New South Wales
National Taiwan University
University of Science and Technology of China
Technion-Israel Institute of Technology
King Abdulaziz University
The University of Melbourne
University of Waterloo
South China University of Technology
Eindhoven University of Technology
Xian Jiao Tong University
Arizona State University
Duke University
Fudan University
King Abdullah University of Science and Technology
Korea University
KU Leuven
Monash University
National Cheng Kung University
National Chiao Tung University
Rice University
Seoul National University
Southeast University
Technical University Munich
Tel Aviv University
The Chinese University of Hong Kong
University of Bristol
University of California, Davis
University of California, Irvine
University of Colorado at Boulder
University of Oxford
University of Southampton
University of Tehran
University of Wisconsin - Madison
Virginia Polytechnic Institute and State University
Zhejiang University
Aalborg University
Central South University
Columbia University
Huazhong University of Science and Technology
Johns Hopkins University
Korea Advanced Institute of Science and Technology
KTH Royal Institute of Technology
Kyoto University
Linkoping University
Osaka University
Peking University
Pohang University of Science and Technology
Polytechnic Institute of Milan
The Hong Kong Polytechnic University
The University of Hong Kong
The University of Manchester
The University of Queensland
The University of Tokyo
University College London
University of Alberta
University of British Columbia
University of Erlangen-Nuremberg
University of Massachusetts Amherst
University of Pennsylvania
University of Tennessee - Knoxville