Background: Adolescence is a critical period in which are establishing habits that impact health throughout lives. Electronic platforms engage adolescents in promoting healthy lifestyles. This study aimed to assess healthy lifestyle among adolescent students through electronic platform. Research design: A descriptive research design was used to achieve the aim of this study. Setting: This study was conducted at all Gove mental secondary schools in Benha City, Qalubyia Governorate, it included eight secondary schools. Sample: Simple random sample of adolescent students; It included 376 adolescent student. Tools: Two tools were used I): A structured online questionnaire which consists of three parts. Part I: Socio-demographic characteristics of adolescents students. Part II): knowledge of adolescent students regarding healthy lifestyle and using electronic platform, Part III): Reported practice of adolescent students regarding healthy lifestyle, II): Likert scale to measure adolescent attitude regarding healthy lifestyle and electronic platform. Results: 52.4% of adolescents' students age16 years old with Mean±SD 16.51±0.57, 49.2% of adolescents students had poor total knowledge regarding healthy life style, 67.6% of them had unhealthy total practices regarding healthy life style and 65.7% of them had negative total attitude regarding healthy life style and electronic platform. Conclusion: There were less than half of adolescents' students had poor total knowledge regarding healthy lifestyle, two thirds of them had unhealthy total practices regarding healthy lifestyle and almost thirds of them had negative total attitude regarding healthy lifestyle and electronic platform. There were positive highly statistically significant correlations between total knowledge, total lifestyle and total attitude regarding healthy lifestyle and using electronic platform. Recommendations: Health education programs should be developed and implemented about healthy lifestyle among adolescents and its effect on health promotion.