The dual use of satellite services raises the question about the legitimacy of the counter actions against their functionality during the armed conflict. This article focused on the examination of the content of the key principles of international humanitarian law, i.e. distinction and proportionality, concerning their application to the space activity. In this context, the criterions of pre and post evaluation of input of space services to the military operation were analysed. The risk of creation of a cloud of space debris because of a breach of humanitarian law was also observed.