Should I write IEEE membership in my CV?
Many CVs have a section for professional society memberships.  Mere membership doesn't necessarily convey a significant distinction, but it does say which groups you have chosen to invest in affiliating with and which judge you to qualify.

For the IEEE in particular, it actually does have fairly strict membership qualifications.  Most people cannot qualify for IEEE membership, but pretty much any practitioner of the field can, because that is what it is designed to select for.  Thus, putting an IEEE membership in your professional society memberships section of your CV is entirely appropriate.