The main purpose of scientific research within this scientific paper is to investigate, analyse and synthesize: 1) the current state of e-business development within the Republic of Croatia's economy (with a special reference to economy of eastern Croatia), 2) individual business entities' attitudes towards e-business in multitudinous activities within the Republic of Croatia's economy as well as 3) (post) graduate students' (from Faculty of Economics at University of Rijeka) perceptions of e-business. As of research approach (and methods) used, authors use the most recent available and the most significant statistical and business data, that is processed and displayed in the context of this scientific paper, in order to elucidate the current state of e-business development within the Republic of Croatia's economy. Moreover, the most significant scientific research findings from the first set of surveys/questionnaires with individual business entities' attitudes towards e-business and the second set of surveys/questionnaires with students' (from Faculty of Economics at University of Rijeka), perceptions of e-business will be represented, explained and elaborated in detail from. From the authors' preliminary scientific research findings it is observable that the major results are going to be useful as a growth-inclusive and vision-inclusive signboards for joint development of both IT sector and other multitudinous activities within the Republic of Croatia's economy with a special reference to economy of eastern Croatia. In this sense, authors have also filtered, listed and investigated how many and which of the business-related survey/questionnaire participants were located in eastern Croatia. Conclusively, concerning implications of this scientific paper and scientific research, those two can be perceived as the beginning of authors' e-business-related research endeavour that will carefully, critically and realistically address e- business issues that are (too) often observed in one-sided, subjective and superficial manner.