Embodiments of the present disclosure disclose a method and a device for estimating optimal resources for server virtualization. The method comprises receiving input data relating to requirements of server virtualization from a user device. The method further comprises filtering the input data by applying filtering rules. The method further comprises generating current landscape information of a plurality of servers using the filtered input data. The method further comprises determining values of virtualization parameters for a plurality of target servers using the current landscape information and predefined rules. The method further comprises determining landscape information of the plurality of target servers using the current landscape information and the values of virtualization parameters for estimating optimal resources for server virtualization.