This research emerged from my interest in investigating the relationship between collecting and projecting in design. Understanding that every designer during his career builds a particular collection of knowledge and information, we investigated what would be the influences exerted by the act of collecting on the designers thinking. We assume that designers who collect develop relationships between this process and their way of thinking about projects. To verify this hypothesis, a literature review was carried out, in which we researched the different aspects of Design Thinking and collecting described in the literature, such as their forms, characteristics, methodologies and processes. Subsequently, qualitative research was carried out through semi-structured interviews with Designers Collectors to assess the existing relationships between their ways of collecting and designing. Based on the bibliographic review and the interviews, the relationships and common characteristics existing in the practices carried out by Designers collectors were specified. By doing this, we validate the hypothesis and define the existing relationships between both practices, demonstrating how projects developed by Designers Collectors differ and are influenced by collecting practices in their development methods and in their creative processes. They build narratives that reflect their tastes, desires and personalities, always using two parallel, distinct and overlapping methodologies: one belonging to their particular universe and the other common to the universe of designers collectors.