9^th Annual Conference (ICEEEE2022)
December 9-10, 2022 丨Online Conference
ICEEEE2022 was held online via Zoom Webinar. 6 keynote Speakers and 7 Invited Speakers presented their latest research during the conference. All accepted papers has been arranged to publish in Springer Book Series Environmental Science and Engineering.  

8^th Annual Conference (ICEEEE2021)
September 25-26, 2021 丨Online Conference
ICEEEE2021 was changed to Online Conference due to the outbreak of COVID-2019. Participants from different parts of the world were connected together with network. All conference sessions were chaired via web remote conference and all presentations were made online. Thank you for all the delegates' cooperation during this virtual conference! We look forward to meeting you all face-to-face next year! 

7^th Annual Conference (ICEEEE2019)
July 19-20, 2019 丨Beijing, China
ICEEEE2019 has received about 100 submissions and attracted 60 participants from 18 countries and area. 2 keynote speakers presented their excellent studies and made it a successful conference. Five Best Oral Presenters and one Best Poster Presenter were selected and awarded. 

6^th Annual Conference (ICEEEE2018)
August 25-26, 2018 丨Beijing, China
The presentation form of "Invited Speaker" was first introduced to the conference, thus attracting 5 outstanding experts to deliver their invited speeches and approximately 30 attendees from home and abroad. And "Best Oral Presentation Award" was awarded to 3 outstanding presenters to encourage their academic passion. 

5^th Annual Conference (ICEEEE2017)
April 15-16, 2017 丨Xiamen, China
Gaining the sponsorship of well-known IJHE Journals, ICEEEE2017 set a special prize for the Best Poster Presentations for the first time, making this conference has more than 30 poster presentations (previous years have less than 25 poster presentations) out of 80 participants. 

4^th Annual Conference (ICEEEE2016)
April 15-16, 2016 丨Hong Kong, China
ICEEEE2016 concluded successfully in HongKong, China. The event has become an annual gathering among professors and researchers to exchange latest trends of the field every year. The conference has attracted 150 participants from around 20 countries and regions. To encourage further academic efforts, 7 best oral presentations and two best poster presentations were selected by listeners and judges based on strict criteria. 

3^rd Annual Conference (ICEEEE2015)
January 24-25, 2015 丨Shanghai, China
The presentation form of "Invited Speaker" was first introduced to the conference, thus attracting 8 outstanding experts to deliver their invited speeches and approximately 50 attendees from home and abroad. And "Best Oral Presentation Award" was awarded to 6 outstanding presenters to encourage their academic passion. 

2^nd Annual Conference (ICEEEE2014)
January 10-11, 2014 丨Shanghai, China
Containing 9 distinguished keynote speakers, 36 oral presentations and 45 poster presentations, the Second ICEEEE Conference became a good platform for worldwide researchers and engineers to exchange and share their experience and research results, and more than 100 excellent papers were successfully published in different EI/SCIE indexed journals. 

1^st Annual Conference (ICEEEE2013)
January 18-19, 2013 丨Hangzhou, China
The ICEEEE conference has attracted 60 participants from 12 countries and regions. It consisted of 3 keynote speeches, 8 invited speeches, 27 oral presentations and 9 poster presentations.