Lee died suddenly last year of a heart attack while grocery shopping.
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His daughter Brianna spoke at the service.
"It's a really beautiful thing that we can all be here at City Hall to remember him today because he poured so much blood and sweat and tears here for so many years," said Brianna Lee.
San Francisco fire chief Joanne Hayes white wipes away tears at a memorial for Mayor Ed Lee who died a year ago today. pic.twitter.com/0ZiecByLbo— Amy Hollyfield (@amyhollyfield) December 12, 2018
She acknowledged that it has been a tough year for the family as relatives dealt with the pure shock of how suddenly he was gone and also as their personal pain became public.
"The outpouring of love and support from our family members, friends and the community at large in San Francisco has been absolutely unforgettable," Lee said.
RELATED: From advocacy work to light-hearted fun, see Ed Lee's career in photos
"Unforgettable" was one of the songs in a medley of songs performed at the ceremony by one of Ed Lee's favorite musical groups, Pure Ecstasy. While some attendees wiped away tears, the speakers made sure to keep the tone light and upbeat.
"It is with a great degree of pride that we celebrate this man's life. We don't mourn him, we celebrate his life. And believe me this city would never be what it is without the standard established by Ed Lee," said Former San Francisco Mayor Willie Brown.
San Francisco Mayor Ed Lee’s daughter Breanna speaking at city hall to remember her dad. She says the outreach over the last year have really humbled the family. pic.twitter.com/anmIfSwwMg— Amy Hollyfield (@amyhollyfield) December 12, 2018
Mayor London Breed concluded the ceremony with the words of Ed Lee: "Now. Let's get to work!"
Brianna Lee later told ABC7 News she didn't know what to expect Wednesday, but she thought the event and the words spoken were great.
See more stories, photos, and videos on the life of Ed Lee.
Mayor London Breed speaking at a service to remember Mayor Ed Lee who died a year ago today. pic.twitter.com/sdFLBx2i3s— Amy Hollyfield (@amyhollyfield) December 12, 2018
Mayor Willie Brown talking about Mayor Ed Lee during a ceremony to remember his life. pic.twitter.com/BdwF2uGJD8— Amy Hollyfield (@amyhollyfield) December 12, 2018
Musical group Pure Ecstasy, a favorite of Mayor Ed Lee’s, performs at a celebration of his life this morning at City Hall. Lee died a year ago today. pic.twitter.com/Lar8FuYa0I— Amy Hollyfield (@amyhollyfield) December 12, 2018