This is an announcement for the paper "Integral representation of linear functionals on function spaces" by Mehdi Ghasemi. Abstract: Let $A$ be a vector space of real valued functions on a non-empty set $X$ and $L:A\rightarrow\mathbb{R}$ a linear functional. Given a $\sigma$-algebra $\mathcal{A}$, of subsets of $X$, we present a necessary condition for $L$ to be representable as an integral with respect to a measure $\mu$ on $X$ such that elements of $\mathcal{A}$ are $\mu$-measurable. This general result then is applied to the case where $X$ carries a topological structure and $A$ is a family of continuous functions and naturally $\mathcal{A}$ is the Borel structure of $X$. As an application, short solutions for the full and truncated $K$-moment problem are presented. An analogue of Riesz-Markov-Kakutani representation theorem is given where $C_{c}(X)$ is replaced with whole $C(X)$. Then we consider the case where $A$ only consists of bounded functions and hence is equipped with $\sup$-norm. Archive classification: math.FA Mathematics Subject Classification: 47A57, 28C05, 28E99 Submitted from: mehdi.ghasemi@usask.ca The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1403.6956 or http://arXiv.org/abs/1403.6956