This paper discusses the tools and methods of data collection and discusses the ethical issues in each individual element of the data collection process. At the beginning of the paper, the individual elements of the data analysis process are explained in more detail, which includes the data collection process as the second step after setting goals and before processing and interpreting and presenting the results. Furthermore, it moves to the processing of tools by which data collection processes are carried out. Classical methods include speech and manual methods (writing aids). Modern methods include telecommunications and the Internet. In the continuation of the paper, the methods by which data are collected are discussed, which are: survey, interview, focus group, observation and data mining. Of these methods, survey, interview, focus group and observation fall under the classical methods while data mining falls under the modern ones. At the end of the paper, classical and modern tools and methods of data collection are combined, and through two aspects (distortion of research results and awareness of participation in research) the topic of ethics of tools and methods is elaborated in more detail.