The "Million Memories" campaign aims to gather pledges to the charity via a bespoke website. The public will be encouraged to use the site to make a donation and upload treasured photos to store and share with friends and family.
The goal is to reach a million photos and raise 拢3m to continue helping the 750,000 people in the UK affected by dementia.
Fundraising agency Cascaid is creating the site as well as a supporting print campaign, with More2 handling PR duties.
The "Million Memories" will link to to allow people to purchase prints and greeting cards from the photos posted, with a percentage going to the charity.
Jo Swinhoe, director of fundraising for the Alzheimer's Society, said: "Memories are a gift we too often take for granted. The "Million Memories" campaign is a simple way to make your memories matter: by donating your favourite memory online, and sharing it with your friends and family, you will be helping people with dementia."
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