At present e-business is standard alternative and its development is very fast. E-commerce is subset of e-business. E-commerce is implementation of the business transactions on the internet (internet stores, booking system, and so on). E-business and e-commerce have directly dependence on information and communication technology (ICT). Many conditions have to be satisfied to e-business systems operate all right and bring contribution. The fundamental element is e-business strategy. Aims, procedures, methods, inputs, outputs and the like have to be analyzed in e-business strategy. Individual parts may be under consideration and analyzed in singles steps or in parallel with regards to contexture. Once of the e-commerce key area is internet stores development. Internet stores are realized as a web sites published on internet. Web sites make possible communication between custom and operators information system. Internet store web sites have to fulfil the quite of number of conditions. Principal aim of the internet store web sites is effort to internet store web sites be displayed in one of the forefront in internet browser after request of user. To this goal for example Search Engine Optimization (SEO) or method of paid references can be used. Both methods are very important for internet marketing and they also can be used together. Data from internet store web sites are computing in firm information system. On this account we have to directly defined dataflow between internet store websites and information system. We can buy software for e-business support from provider or new software can be developed. In both cases we have to pay attention to risk areas. Conditions of successful implementation of e-business in firm are in the end of the article.
